**Density** represents the mass of an object or compound within a given volume.

Concept #1: Understanding Density

Density establishes a relationship between **mass** and **volume**.

Example #1: If the density of an unknown metal is 21.4 grams per cubic centimeters, express its density in pounds per cubic feet. Remember that 1 in = 2.54 cm.

Density questions can include dimensional analysis so remember to use the same approach as you would normally.

Example #2: A piece of unknown metal weighs approximately 0.45 lbs. When a scientist places it in a glass beaker the water level increases from 1.85 L to 2.13 L. What is the density of the palladium metal in g/mL?

In a **water displacement **question the volume of the water increases with the added volume of the unknown substance.

Practice: The U.S. Environmental Protection Agency sets the maximum safe level of lead in blood at 24 μg per dL of blood. The average person has 60 mL of blood per kilogram of body weight. For a 63.7-kg (140.459 lb) person, what is the total maximum safe content of lead in blood?

Substance A has a density of 1.7 g/cm3. Substance B has a density of 1.7 kg/m3. Without doing any calculations, determine which substance is most dense.

Determine the volume of an object that has a mass of 455.6 g and a density of 19.3 g/cm 3.
A) 42.4 mL
B) 87.9 mL
C) 18.5 mL
D) 31.2 mL
E) 23.6 mL

A 200-mL Erlenmeyer flask weighs 218.5 grams when empty and 298.3 grams when filled with an unknown alcohol to the 125-mL mark. Determine the density of the alcohol (g/mL).

The density of magnesium is 1.7 g/cm3, while that of iron is 7.9 g/cm3. A block of iron has a mass of 819 g. What is the mass of a block of magnesium that has the same volume as the block of iron?
A) 4.7 g
B) 1.8 x 102 g
C) 3.8 x 102 g
D) 4.8 x 103 g
E) 8 x 103 g

What volume of alcohol (d = 0.800 g/mL) is needed to obtain 320 g of alcohol?
a. 400 mL
b. 256 mL
c. 100 mL
d. 80 mL
e. 320 mL

The density of vanadium metal is 6.00 g/cm 3. What volume of vanadium, in μL, has a mass of 0.225 mg?
a. 0.0375 μL
b. 37.5 μL
c. 3.75 x 104 μL
d. 375 μL

A container that can hold 6780 g Hg can only hold 797 g CCl4. Given that the density of Hg is 13.6 g/mL, calculate the density of CCl4.

A new penny has a mass of 2.49 g and a volume of 0.349 cm 3. Is the penny made of pure copper? Explain.

Human fat has a density of 0.918 g/cm 3. How much volume (in cm3) is gained by a person who gains 10.0 lbs of pure fat?

The density of titanium is 4.51 g/cm3. What is the volume (in cubic inches) of 3.5 lb of titanium?

Answer the following questions.A certain type of wood has a density of 0.42 g/cm3 . What is the mass of 2.0 cord of this wood in kg, where 1 cord is 128 cubic feet of wood?

Answer the following questions.A particular sample of crude oil has a density of 0.84 g/mL . What is the mass of 2.00 barrel of this crude oil in kg, where a barrel of oil is exactly 42 gallons?

A bag of Hersheys Kisses contains the following information:
Serving size: 9pieces= 41grams
Calories per serving: 230.
Total fat per serving: 13 gThe density of a Hersheys Kiss is 1.4 g/mL. What is the volume of a single Hersheys Kiss?

Vinaigrette salad dressing consists mainly of oil and vinegar. The density of olive oil is 0.918 g/cm3, the density of vinegar is 1.006 g/cm3, and the two do not mix.If a certain mixture of olive oil and vinegar has a total mass of 402.6 g and a total volume of 422.6 cm3 , what is the volume of oil and what is the volume of vinegar in the mixture?

A sample of tetrachloroethylene, a liquid used in dry cleaning that is being phased out because of its potential to cause cancer, has a mass of 40.55 g and a volume of 25.0 mL at 25 oC. What is its density at this temperature?

Carbon dioxide (CO2) is a gas at room temperature and pressure. However, carbon dioxide can be put under pressure to become a "supercritical fluid" that is a much safer dry-cleaning agent than tetrachloroethylene. At a certain pressure, the density of supercritical CO2 is 0.469 g/cm3. What is the mass of a 25.0-mL sample of supercritical CO2 at this pressure?

Ocean currents are measured in Sverdrups (sv) where 1 sv=109 m3/s. The Gulf Stream off the tip of Florida, for instance, has a flow of 35 sv.What mass of water in the Gulf Stream flows past a given point in 24 hours? The density of seawater is 1.025 g/mL.

Hydrogen cyanide, HCN, is a poisonous gas. The lethal dose is approximately 310 mg
mg HCN per kilogram of air when inhaled.Calculate the amount of HCN that gives the lethal dose in a small laboratory room measuring 13
ft
16
ft 8.0g/cm3. The density of air at 26^circ
m C is 0.00118
m g/cm^3.

A flask containing
7.50 mL
of a liquid weighs
168.1 g
with the
liquid in the flask and
160.1 g
when empty.Calculate the density of the liquid in g/mL to the correct number of significant digits.

A flask containing
15.0 mL
of a liquid weighs
128.1 g
with the
liquid in the flask and
120.1 g
when empty.Calculate the density of the liquid in g/mL to the correct number of significant digits.

A small airplane takes on 281 L of fuel.If the density of the fuel is 0.821 g/mL, what mass of fuel has the airplane taken on?

The density of air at ordinary atmospheric pressure and 25 oC is 1.19 g/L. What is the mass, in kilograms, of the air in a room that measures 13.5
imes;
18.5
imes;
8.0
ft?

What is the density of glass in g/cm3 if a sample weighing 27.94 g has a volume of 11.81 cm3 ?

Aspirin has a density of 1.40 g/cm3. What is the volume (in cubic centimeters) of an aspirin tablet weighing 2.6×102 mg ?

Water has a density of 0.997 g/cm3 at 25 oC; ice has a density of 0.917 g/cm3 at -10 oC.If a soft-drink bottle whose volume is 1.60 L is completely filled with water and then frozen to -10 oC, what volume does the ice occupy?

Water has a density of 0.997 g/cm3 at 25 oC; ice has a density of 0.917 g/cm3 at -10 oC.Can the ice be contained within the bottle?

Gold is alloyed (mixed) with other metals to increase its hardness in making jewelry.Consider a piece of gold jewelry that weighs 9.60 g and has a volume of 0.670 cm3 . The jewelry contains only gold and silver, which have densities of 19.3 g/cm3 and 10.5 g/cm3, respectively. If the total volume of the jewelry is the sum of the volumes of the gold and silver that it contains, calculate the percentage of gold (by mass) in the jewelry.

The density of titanium is 4.51 g/cm3.What is the volume (in cubic inches) of 3.6 lb of titanium?

A pure diamond has a density of 3.52 g/cm3. Set up
a dimensional-analysis equation to find the volume (cm3) of the
Hope Diamond that weighs 44.4 carats. (1 carat = 200 mg)

Liquid nitrogen has a density of 0.808 g/mL and boils at 77 K. Researchers often purchase liquid nitrogen in insulated 177 L tanks. The liquid vaporizes quickly to gaseous nitrogen (which has a density of 1.15 g/L at room temperature and atmospheric pressure) when the liquid is removed from the tank. Suppose that all 177 L of liquid nitrogen in a tank accidentally vaporized in a lab that measured 12.00 m
m
12.00 m
imes
3.50 m .What maximum fraction of the air in the room could be displaced by the gaseous nitrogen?

Using the mass of the proton 1.0073 amu and assuming its diameter is 1.0 10 - 15 m, calculate the density of a proton in g/cm3.

Section 1.7 showed that in 1997 Los Angeles County air had carbon monoxide (CO) levels of 15.0 ppm. An average human inhales about 0.50 L of air per breath and takes about 20 breaths per minute.How many milligrams of carbon monoxide does the average person inhale in an 8 hour period for this level of carbon monoxide pollution? Assume that the carbon monoxide has a density of 1.2 g/L. (Hint: 15.0 ppm CO means 15.0 L per 106 air.)

Nanotechnology, the field of trying to build ultrasmall structures one atom at a time, has progressed in recent years. One potential application of nanotechnology is the construction of artificial cells. The simplest cells would probably mimic red blood cells, the bodys oxygen transporters. For example, nanocontainers, perhaps constructed of carbon, could be pumped full of oxygen and injected into a persons bloodstream. If the person needed additional oxygen-due to a heart attack perhaps, or for the purpose of space travel-these containers could slowly release oxygen into the blood, allowing tissues that would otherwise die to remain alive. Suppose that the nanocontainers were cubic and had an edge length of 24 nanometers.Normal air contains about 0.28 g of oxygen per liter. An average human inhales about 0.50 L of air per breath and takes about 20 breaths per minute. How many grams of oxygen does a human inhale per hour? (Assume two significant figures.)

Automobile batteries contain sulfuric acid, which is commonly referred to as "battery acid".Calculate the number of grams of sulfuric acid in 1 gallon of battery acid if the solution has a density of 1.31 g/mL and is 38.2 % sulfuric acid by mass.

A 40-lb container of peat moss measures 14in 20lb 30 gal. A 40-lb container of topsoil has a volume of 1.9 {
m gal}.Calculate the average density of peat moss in units of g/cm3.

A 40-lb container of peat moss measures 14in 20lb 30 gal. A 40-lb container of topsoil has a volume of 1.9 {
m gal}.Calculate the average density of topsoil in units of g/cm3.

In 2009, a team from Northwestern University and Western Washington University reported the preparation of a new "spongy" material composed of nickel, molybdenum, and sulfur that excels at removing mercury from water. The density of this new material is 0.20 g/cm3, and its surface area is 1242 m2 per gram of material.Calculate the volume of a 35.0 -mg sample of this material.

In 2009, a team from Northwestern University and Western Washington University reported the preparation of a new "spongy" material composed of nickel, molybdenum, and sulfur that excels at removing mercury from water. The density of this new material is 0.20 g/cm3, and its surface area is 1242 m2 per gram of material.What is the final mass of the spongy material after the exposure to mercury?

In 2009, a team from Northwestern University and Western Washington University reported the preparation of a new "spongy" material composed of nickel, molybdenum, and sulfur that excels at removing mercury from water. The density of this new material is 0.20 g/cm3, and its surface area is 1242 m2 per gram of material.A 10.0-mL sample of contaminated water had 7.748 mg of mercury in it. After treatment with 10.0 mg of the new spongy material, 0.001 mg of mercury remained in the contaminated water. What percentage of the mercury was removed from the water?

Chloroform, a substance once used as an anesthetic, has a density of 1.483 g/mL at 20 oC.How many milliliters would you use if you needed 8.03 g ?

A new penny has a mass of
2.49 g
and a volume of
0.349
cm3. Is the penny made of pure copper?

Ethylene glycol (antifreeze) has a density of 1.11 g/cm3.What is the mass in g of
426 mL
of ethylene glycol?

Ethylene glycol (antifreeze) has a density of 1.11 g/cm3.What is the volume in L of
4.1 kg
of ethylene glycol?

A vessel contains
5.50
L
of concentrated HCl, whose density is
1.18
g/cm3.
What is the mass in kilograms of the HCl in the vessel (in kilograms)?

Very small semiconductor crystals composed of approximately 1000 to 100,000 atoms, are called quantum dots. Quantum dots made of the semiconductor CdSe are now being used in electronic reader and tablet displays because they emit light efficiently and in multiple colors depending on dot size. The density of CdSe is 5.82 g/cm3.What is the mass of one 2.5-nm
CdSe quantum dot? Assume that the dot is a
perfect sphere.

The density of chloroform, a widely used organic solvent, is 1.4832 g/mL at 20 oC.How many milliliters would you use if you wanted 110.5 g of chloroform?

Very small semiconductor crystals composed of approximately 1000 to 100,000 atoms, are called quantum dots. Quantum dots made of the semiconductor CdSe are now being used in electronic reader and tablet displays because they emit light efficiently and in multiple colors depending on dot size. The density of CdSe is 5.82 g/cm3.What is the mass of one 6.5-nm
CdSe quantum dot?

Answer the following questions.An old rule of thumb in cooking says: "A pints a pound the world around." What is the density in g/mL of a substance for which 1 pt = 1lb exactly?

Very small semiconductor crystals composed of approximately 1000 to 100,000 atoms, are called quantum dots. Quantum dots made of the semiconductor CdSe are now being used in electronic reader and tablet displays because they emit light efficiently and in multiple colors depending on dot size. The density of CdSe is 5.82 g/cm3.If you wanted to make one 6.5-nm dot from multiple 2.5-nm dots, how many 2.5-nm dots would you need?

Will tetrachloroethylene float on water? (Materials that are less dense than water will float.)

Lignum vitae is a hard, durable, and extremely dense wood used to make ship bearings. A sphere of this wood with a diameter of 7.61 cm has a mass of 311 g . Will the sphere float or sink in chloroform? (The density of chloroform is 1.48 g/mL).

You are assigned the task of separating a desired granular material, with a density of 3.62 g/cm3, from an undesired granular material that has a density of 2.04 g/cm3. You want to do this by shaking the mixture in a liquid in which the heavier material will fall to the bottom and the lighter material will float. A solid will float on any liquid that is more dense. Using the
Internet or a handbook of chemistry, look for the densities of the
following substances: carbon tetrachloride, hexane, benzene,
and diiodomethane.Which of these liquids will serve your purpose, assuming no chemical interaction between the liquid and the solids?

Substance A has a density of 1.7 g/cm3. Substance B has a density of 1.7 kg/m3.Without doing any calculations, determine which substance is most dense.

For each box below, examine the blocks attached to the balances.Based on their positions and sizes, determine which block is more dense (the dark block or the lighter-colored block), or if the relative densities cannot be determined. (Think carefully about the information being shown.)
The first picture.

For each box below, examine the blocks attached to the balances.The second picture.

For each box below, examine the blocks attached to the balances.The third picture.

Two spheres of equal volume are placed on the scales as shown.
Which one is more dense?

Which block in the following drawing of a balance is more dense, red or green?

Which block in the following drawing of a balance is more dense, red or green?

The following cylinder contains three liquids that do not mix with one another: water (density=1.0g/mL),vegetable oil (density=0.93g/mL), and mercury (density=13.5g/mL).
Which liquid is which?

A 10.0 cm long cylindrical glass tube, sealed at one end, is filled with ethanol. The mass of ethanol needed to fill the tube is found to be 11.88 g . The density of ethanol is 0.789 g/mL. Calculate the inner diameter of the tube in centimeters.

A solid aluminum sphere has a mass of 86 g .Use the density of aluminum to find the radius of the sphere in inches.

Approximate the percent increase in waist size that occurs when a
150-lb
person gains
35.0 lb
of fat. Assume that the volume of the person can be modeled by a cylinder that is 4.0 ft
tall. The average density of a human is about 1.0 g/cm3, and the density of fat is 0.918 g/cm3.

Neutron stars are believed to be composed of solid nuclear matter, primarily neutrons.Assuming that a neutron star has the same density as a neutron, calculate the mass (in kg) of a small piece of a neutron star the size of a spherical pebble with a radius of 0.16 mm .

Neutron stars are believed to be composed of solid nuclear matter, primarily neutrons.Assume the radius of a neutron to be approximately 1.0 10 - 13
cm, and calculate the density of a neutron. [ exttip{Hint}{Hint}: For a sphere V = (4/3)r3.]

Carbon-12 contains 6 protons and 6 neutrons. The radius of the nucleus is approximately 2.7 fm (femtometers) and the radius of the atom is approximately 70 pm (picometers).Calculate the volume of the nucleus and the volume of the atom. (Assume two significant figures.)

Carbon-12 contains 6 protons and 6 neutrons. The radius of the nucleus is approximately 2.7 fm (femtometers) and the radius of the atom is approximately 70 pm (picometers).What percentage of the carbon atoms volume is occupied by the nucleus? (Assume two significant figures.)

You are given a cube of silver metal that measures 1.050 cm on each edge. The density of silver is 10.5 g/cm3.Because atoms are spherical, they cannot occupy all of the space of the cube. The silver atoms pack in the solid in such a way that 74% of the volume of the solid is actually filled with the silver atoms. Calculate the volume of a single silver atom.

You are given a cube of silver metal that measures 1.050 cm on each edge. The density of silver is 10.5 g/cm3.Using the volume of a silver atom and the formula for the volume of a sphere, calculate the radius in angstroms of a silver atom.

Lignum vitae is a hard, durable, and extremely dense wood used to make ship bearings. A sphere of this wood with a diameter of 7.61 cm has a mass of 311 g .What is the density of the lignum vitae sphere?

The single proton that forms the nucleus of the hydrogen atom has a radius of approximately 1.0 10 - 13 . The hydrogen atom itself has a radius of approximately 52.9 pm.What fraction of the space within the atom is occupied by the nucleus?

In 1999, scientists discovered a new class of black holes with masses 100 to 10,000 times the mass of our sun, but occupying less space than our moon. Suppose that one of these black holes has a mass of 1103 suns and a radius equal to one-half the radius of our moon.What is the density of the black hole in g/cm3? The radius of our sun is 7.0 105 and it has an average density of 1.4 103 /m3. The diameter of the moon is 2.16 103 miles.

A thief plans to steal a gold sphere with a radius of 28.5 cm from a museum. If the gold has a density of 19.3 g/cm3, what is the mass of the sphere in pounds? [The volume of a sphere is V = (4/3) r3.]

A calibrated flask was filled to the 25.00 mL mark with ethyl alcohol. By weighing the flask before and after adding the alcohol, it was determined that the flask contained 19.7325 g of alcohol. In a second experiment, 25.5020 g of metal beads were added to the flask, and the flask was again filled to the 25.00 mL mark with ethyl alcohol. The total mass of the metal plus alcohol in the flask was determined to be 38.9864 g .What is the density of the metal in g/mL?

When an irregularly shaped chunk of silicon weighing 8.763 g was placed in a graduated cylinder containing 25.00 mL of water, the water level in the cylinder rose to 28.76 mL.What is the density of silicon in g/cm3?

A 32.70-g sample of a solid is placed in a flask. Toluene, in which the solid is insoluble, is added to the flask so that the total volume of solid and liquid together is 51.00 mL . The solid and toluene together weigh 58.60 g . The density of toluene at the temperature of the experiment is 0.864 g/mL.What is the density of the solid?

A box contains a mixture of small copper spheres and small lead spheres. The total volume of both metals is measured by the displacement of water to be 426 cm3 and the total mass is 4.31 kg .What percentage of the spheres are copper?

You are beachcombing on summer vacation and find a silver bracelet. You take it to the jeweler and he tells you that it is silver plated and will give you $10 for it. You do not want to be swindled so you take the bracelet to your chemistry lab and find its mass on a balance (80.0 g). To measure the volume you place the bracelet in a graduated cylinder, containing 10.0 mL of water at 20 oC. The final volume in the graduated cylinder after the bracelet has been added is 17.61
mL. The density of silver at 20 oC is 10.5 g/cm3 and 1 cm3= 1 mL.What can you conclude about the identity of the metal in the bracelet?

You would like to determine if a set of antique silverware is pure silver. The mass of a small fork was measured on a balance and found to be 85.01
g. The volume was found by dropping the fork into a graduated cylinder initially containing 10.00 mL of water. The volume after the fork was added was 15.51
mL.Calculate the density of the fork.

You would like to determine if a set of antique silverware is pure silver. The mass of a small fork was measured on a balance and found to be 85.01
g. The volume was found by dropping the fork into a graduated cylinder initially containing 10.00 mL of water. The volume after the fork was added was 15.51
mL.If the density of pure silver at the same temperature is 10.5 g/cm3, is the fork pure silver?

An experiment is performed to determine if pennies are made of pure copper. The mass of 11 pennies was measured on a balance and found to be 26.951
g. The volume was found by dropping the 11 pennies into a graduated cylinder initially containing 10.00 mL of water. The volume after the pennies were added was 12.90 mL.Calculate the density of the pennies.

An experiment is performed to determine if pennies are made of pure copper. The mass of 11 pennies was measured on a balance and found to be 26.951
g. The volume was found by dropping the 11 pennies into a graduated cylinder initially containing 10.00 mL of water. The volume after the pennies were added was 12.90 mL.If the density of pure copper at the same temperature is 8.96 g/cm3, are the pennies made of pure copper?

A supposedly gold nugget displaces
18.1 mL
of water and has a
mass of
349 g.Could the nugget be made of gold?

The element gallium (Ga) has the second largest liquid range of any element, melting at 29.78 oC and boiling at 2204 oC at atmospheric pressure.What is the density of gallium in g/cm3
at 25 oC if a 1 in cube has a mass of 0.2133 lb?

What is the density of lead (in g/cm3 ) if a rectangular bar measuring 0.50 cm in height, 1.55 cm in width, and 25.00 cm in length has a mass of 219.1 g ?

The density of silver is 10.5 g/cm3.What is the mass (in kilograms) of a cube of silver that measures 0.56 m on each side?

A piece of aluminum foil 1.00 cm square and 0.560 mm thick is allowed to react with bromine to form aluminum bromide.How many moles of aluminum were used? (The density of aluminum is 2.699 g/cm3.)

Nanotechnology, the field of trying to build ultrasmall structures one atom at a time, has progressed in recent years. One potential application of nanotechnology is the construction of artificial cells. The simplest cells would probably mimic red blood cells, the bodys oxygen transporters. For example, nanocontainers, perhaps constructed of carbon, could be pumped full of oxygen and injected into a persons bloodstream. If the person needed additional oxygen-due to a heart attack perhaps, or for the purpose of space travel-these containers could slowly release oxygen into the blood, allowing tissues that would otherwise die to remain alive. Suppose that the nanocontainers were cubic and had an edge length of 24 nanometers.What is the volume of one nanocontainer? (Ignore the thickness of the nanocontainers wall.)

Nanotechnology, the field of trying to build ultrasmall structures one atom at a time, has progressed in recent years. One potential application of nanotechnology is the construction of artificial cells. The simplest cells would probably mimic red blood cells, the bodys oxygen transporters. For example, nanocontainers, perhaps constructed of carbon, could be pumped full of oxygen and injected into a persons bloodstream. If the person needed additional oxygen-due to a heart attack perhaps, or for the purpose of space travel-these containers could slowly release oxygen into the blood, allowing tissues that would otherwise die to remain alive. Suppose that the nanocontainers were cubic and had an edge length of 24 nanometers.Suppose that each nanocontainer could contain pure oxygen pressurized to a density of 86 g/L . How many grams of oxygen could be contained by each nanocontainer?

What is the density of lead (in g/cm3 ) if a rectangular bar measuring 0.50 cm in height, 1.55 cm in width, and 25.00 cm in length has a mass of 219.1 g ?

Brass is a copper-zinc alloy.What is the mass in grams of a brass cylinder having a length of 2.02 in. and a diameter of 0.492 in. , if the composition of the brass is 67.0% copper and 33.0% zinc by mass? The density of copper is 8.92 g/cm3, and the density of zinc is 7.14 g/cm3. Assume that the density of the brass varies linearly with composition.

What is the density of lithium metal in g/cm3 if a cylindrical wire with a diameter of 2.40 mm and a length of 15.0 cm has a mass of 0.3624 g?

A steel cylinder has a length of 2.16 in, a radius of 0.22 in, and a mass of 41 g.What is the density of the steel in g/cm3?

Mercury is often used as an expansion medium in a thermometer. The mercury sits in a bulb on the bottom of the thermometer and rises up a thin capillary as the temperature rises. Suppose a mercury thermometer contains 3.400 g of mercury and has a capillary that is 0.210 mm in diameter.How far does the mercury rise in the capillary when the temperature changes from 0.0 oC to 25.0 oC? The density of mercury at these temperatures is 13.596 g/cm3 and 13.534 g/cm3, respectively.

The U.S. Mint produces a dollar coin called the American Silver Eagle that is made of nearly pure silver. This coin has a
diameter of 41 mm
and a thickness of 2.5 mm. The density
and approximate market price of silver are 10.5 g/cm3
and
$0.52
per gram, respectively.Calculate the value of the silver
in the coin, assuming its thickness is uniform.

A U.S. 1-cent coin (a penny) has a diameter of 19 mm
and a
thickness of 1.5 mm. Assume the coin is made of pure copper,
whose density and approximate market price are 8.9 g/cm3
and $2.55
per pound, respectively.Calculate the value of
the copper in the coin, assuming its thickness is uniform.

A thief uses a can of sand to replace a solid gold cylinder that sits on a weight-sensitive, alarmed pedestal. The can of sand and the gold cylinder have exactly the same dimensions (length = 24 cm
and radius = 4.1 cm ).Calculate the mass of each cylinder (ignore the mass of the can itself). (density of gold = 19.3 g/cm3, density of sand = 3.00 g/cm3)

A thief uses a can of sand to replace a solid gold cylinder that sits on a weight-sensitive, alarmed pedestal. The can of sand and the gold cylinder have exactly the same dimensions (length = 24 cm
and radius = 4.1 cm ).Does the thief set off the alarm?

The single proton that forms the nucleus of the hydrogen atom has a radius of approximately 1.0 X 10-13 cm. The hydrogen atom itself has a radius of approximately 52.9 pm. What fraction of the space within the atom is occupied by the nucleus?

A cube of osmium metal 1.500 cm on a side has a mass of 76.31 g at 25 °C. What is its density in g/cm3 at this temperature?

The density of titanium metal is 4.51 g/cm3 at 25 °C. What mass of titanium displaces 125.0 mL of water at 25 °C?

The density of benzene at 15 °C is 0.8787 g/ mL. Calculate the mass of 0.1500 L of benzene at this temperature.

The density of osmium (the densest metal) is 22.57 g/cm3. If a 1.00-kg rectangular block of osmium has two dimensions of 4.00 cm x 4.00 cm, calculate the third dimension of the block.

A copper wire (density = 8.96 g/cm3) has a diameter of 0.25 mm. If a sample of this copper wire has a mass of 22 g, how long is the wire?

A sheet of copper is 18.0 in x 7.00 in and a mass of 0.0318 g. Given that the density of copper is 8.96 g/cm3. What is the thickness of the copper sheet?a. 282 nmb. 4.4 x 10-6 nmc. 0.044 nmd. 43.7 nme. 3.51 x 103 nm

Lead metal can be extracted from a mineral called galena, which contains 86.6% lead by mass. A particular ore contains 68.5% galena by mass. If the lead can be extracted with 92.5% efficiency, what mass of ore is required to make a lead sphere with a 5.00 em radius?

After the label fell off a bottle containing a clear liquid believed to be benzene, a chemist measured the density of the liquid to verify its identity. A 25.0-mL portion of the liquid had a mass of 21.95 g. A chemistry handbook lists the density of benzene at 15 °C as 0.8787 g/ mL.Is the calculated density in agreement with the tabulated value?

An experiment requires 15.0 g of cyclohexane, whose density at 25 °C is 0.7781 g/mL. What volume of cyclohexane should be used?

A spherical ball of lead has a diameter of 5.0 cm. What is the mass of the sphere if lead has a density of 11.34 g/cm3? (The volume of a sphere is (4/3)πr3, where r is the radius.)

A cylindrical rod formed from silicon is 16.8 cm long and has a mass of 2.17 kg. The density of silicon is 2.33 g/cm3. What is the diameter of the eylinder? (The volume of a eylinder is given by πr2h, where r is the radius, and h is its length.)

Silicon for computer chips is grown in large cylinders called “boules” that are 300 mm in diameter and 2 m in length, as shown. The density of silicon is 2.33 g/cm3. Silicon wafers for making integrated circuits are sliced from a 2.0 m boule and are typically 0.75 mm thick and 300 mm in diameter. (a) How many wafers can be cut from a single boule? (b) What is the mass of a silicon wafer? (The volume of a cylinder is given by πr2h, where r is the radius and h is its height.)

For each box, examine the blocks attached to the balances. Based on their positions and sizes, determine which block is more dense (the dark block or the lighter-colored block), or if the relative densities cannot be determined. (Think carefully about the information being shown.)

A cube of aluminum metal contains 3.35 x 1023 atoms. The density of aluminum is 2.70 g/cm3. What is the length of the edge of the cube? Recall, volume = length 3 (for a cube).A) 1.77 cmB) 5.56 cmC) 2.70 cmD) 15.0 cm

Titanium metal, density of 4.54 g/cm3, is used to make golf clubs. A rectangular bar of titanium which weighs 45.7 g measures 1.84 cm in length and 2.24 cm in width. What is the height of the bar?A) 50.3 cmB) 2.44 cmC) 252 cmD) 12.3 cmE) 4.09 cm

The density of dichloromethane, an organic solvent, is 1.325 g/cm3 . If you mix 50 mL water and 50 mL dichloromethane together in a separatory funnel, which layer would be on top?
The density of diethyl ether, an organic solvent, is 0.706 g/cm3 . If you mix 50 mL water and 50 mL diethyl ether together in a separatory funnel, which layer would be on top?

The density of aluminum is 2.70 ×10 3 kg/m3. Calculate the volume (in m3) occupied per atom of aluminum.

A sample has a density of 1.05 g/mL. What is the volume in mL (written in scientific notation) that 2.9 kg of the sample would occupy? You must use dimensional analysis

For each of the following, decide which block is more dense: the orange block, the blue block, or it cannot be determined. Explain your answers.

For each of the following, decide which block is more dense: the orange block, the blue block, or it cannot be determined. Explain your answers.

For each of the following, decide which block is more dense: the orange block, the blue block, or it cannot be determined. Explain your answers.

A student is trying to find out what metal the yard sale ring is made of. The ring, when dropped into a cup of water, displaces 0.5 mL of water. The mass of the ring is 2.2g. Determine the most likely metal that the ring is made from.Metal density (g/ml)Cu 8.96Al 2.70Ti 4.51Fe 7.86Au 19.3Pt 2.4

A sample of unknown metal is placed in a graduated cylinder containing water. The mass of the sample is 37.5 g and the water levels before and after the addition of the sample are shown below. What is the density of the metal sample?

You are given a marble made up of one of the metals listed below. To determine which one, you weigh the marble - it is 32.3 grams - and then drop it in a graduated cylinder containing 50.0 mL of water. The volume of the marble and the water is 53.6 mL. What is the metal?a. Ti (d = 4.54 g/cm3)b. Co (d = 8.90 g/cm3)c. Mg (d = 1.74 g/cm3)d. Al (d = 2.70 g/cm3)e. Ag (d = 10.5 g/cm3)

The density of iron is 7.87g/ml . What is the mass of a 5.00 cm * 4.00cm * 1.00cm block of iron?

The density of cobalt (II) oxide is 6.45 g/cm3. What is the volume occupied by a 5.57 kg sample of cobalt (II) oxide?a. 3.40 x 103 cm3b. 817 cm3c. 122 cm3d. 34.0 cm3e. 864 cm3

Determine the density of an object that has a mass of 149.8 g and displaces 12.1 mL of water when placed in a graduated cylinder.A) 11.4 g/mLB) 12.4 g/mLC) 1.38 g/mLD) 18.1 g/mLE) 8.08 g/mL

By using estimation techniques, determine which of the following is the heaviest and which is the lightest: a 5-lb bag of potatoes, a 5-kg bag of sugar, or 1 gal of water (density = 1.0 g/mL).

Neutron stars are composed of solid nuclear matter, primarily neutrons. Assume the radius of a neutron is approximately 1.0 x 10–13 cm, and calculate the density of a neutron. [ Hint: For a sphere V = (4/3)πr 3.] Assuming that a neutron star has the same density as a neutron, calculate the mass (in kg) of a small piece of a neutron star the size of a spherical pebble with a radius of 0.10 mm.

A copper refinery produces a copper ingot weighing 150 lb. If the copper is drawn into wire whose diameter is 8.25 mm, how many feet of copper can be obtained from the ingot? The density of copper is 8.94 g/cm3 (Assume that the wire is a cylinder whose volume is V = πr2h, where r is its radius and h is its height or length.)

Carbon-12 contains 6 protons and 6 neutrons. The radius of the nucleus is approximately 2.7 fm (femtometers) and the radius of the atom is approximately 70 pm (picometers). Calculate the volume of the atom. What percentage of the carbon atom's volume is occupied by the nucleus? ( Assume two significant figures.)

A copper refinery produces a copper ingot weighing 150 lb. If the copper is drawn into wire whose diameter is 7.50 mm, how many feet of copper can be obtained from the ingot? The density of copper is 8.94 g/cm3. (Assume that the wire is a cylinder whose volume V = πr 2h , where r is its radius and h is its height or length.)

Ethyl chloride is sold as a liquid (see photo) under pressure for use as a local skin anesthetic. Ethyl chloride boils at 12°C at atmospheric pressure. When the liquid is sprayed onto the skin, it boils off, cooling and numbing the skin as it vaporizes. (a) What changes of state are involved in this use of ethyl chloride? (b) What is the boiling point of ethyl chloride in degrees Fahrenheit? (c) The bottle shown contains 103.5 mL of ethyl chloride. The density of ethyl chloride at 25°C is 0.765 g/cm3. What is the mass of ethyl chloride in the bottle?

The density of osmium is reported by one source to be 22610 kg/m3. What is this density in g/cm3? What is the mass of a block of osmium measuring 10.0 cm x 8.0 cm x 9.0 cm?

A certain cylinder has a diameter of 5.0 in and a height of 5 in. Calculate the volume (in cubic centimeters) of the cylinder. (Vcylinder = π r 2h)If the density of the cylinder is 25 g/mL, what is its mass (in kg)?

A gold ingot weighs 5.50 lbs. If the density of gold is 19.31 g/cm 3, and the length and width of the ingot are 12.0 cm and 3.00 cm respectively, what is the height of the ingot?A) 10.2 cm B) 1.34 × 103 cm C) 3.59 cm D) 6.50 × 10-3 cm

An aluminum sphere contains 8.55 x 10 22 aluminum atoms. What is the sphere's radius in centimeters? The density of aluminum is 2.70 g/ cm3. Recall that the volume of a sphere is given by the formula: 4/3 π r3 A. 1.4187 cm 3B. 0.697 cmC. 0.339 cmD. 0.822 cmE. 7.8583 x10-1 cm

(a) Three spheres of equal size are composed of aluminum (density = 2.70 g/cm 3), silver (density = 10.49 g/cm3), and nickel (density = 8.90 g/cm3). List the spheres from lightest to heaviest.

(b) Three cubes of equal mass are composed of gold (density = 19.32 g/cm 3), platinum (density = 21.45 g/cm3), and lead (density = 11.35 g/cm3). List the cubes from smallest to largest. [Section 1.4]

The estimated mass of the planet Jupiter is 1.90 × 10 27 kg and the density is believed to be 1.34 g/cm3. If Jupiter were a perfect sphere, what would be its diameter?A) 6.96 × 107 m B) 1.39 × 107 m C) 1.39 × 108 m D) 6.96 × 106 m

Osmium is the densest known element, with density 22.59 g/cm3. The tip of a fountain pen contains 152 mg of Osmium. What is the volume of Osmium in the pen in units of microliters, μL?a. 0.152 μLb. 6.73 μLc. 0.149 μLd. 149 μL

Lignum vitae is a hard, durable, and extremely dense wood used to make ship bearings. A sphere of this wood with a diameter of 7.61 cm has a mass of 311 g .Will the sphere float or sink in water?

A cylindrical tube has a length that is 15.2 cm and is filled with bromine liquid. If the mass of the bromine is 112.3 g and has a density of 25.3 g/mL, then what is the inner diameter of the glass tube? ( V = π • r2 • h )

Osmium is the densest known element, with density 22.59 g/cm 3 . The tip of a fountain pen contains 152 mg osmium. What is the volume of osmium in the pen in units of microliters, µL? A. 0.152 µLB. 6.73 µLC. 0.149 µLD. 149 µL

An aluminum sphere contains 8.66 x 1022 aluminum atoms. What is the sphere’s radius in centimeters? The density of aluminum is 2.70 g/cm3 . Recall that the volume of a sphere is given by the formula: 4/3 π r31.418 cm30.699 cm0.339 cm0.822 cm7.8586 x 10-1 cm

The density of gold is 19.31 g/cm 3. A rectangular bar of gold has a mass of 66.75 g and measures 3.04 cm width and 25.5 cm in height. What is the length of the gold bar?a) 0.0446 cm b) 0.0550 cm c) 0.0189 cm d) 0.0592 cm

What mass of silver is required for an object that is to be coated in a uniform 0.32 mm thick layer of silver that has surface area of 162 cm 2? The density of silver is 10.49 g/cm 3.

What is the mass (in grams) of 4 L of gasoline if the density of gasoline is 0.79 g/ml?a. 2.2e3b. 3.2e3c. 4.3e3d. 5.4e3e. 6.5e3

If a box measuring 16.80 cm x 14.12 cm x 29.44 cm has a mass of 871 g at a given temperature, what is the density?A. 0.0105 g/cm3B. 0.125 g/cm3C. 5.15 g/cm3D. 8.02 g/cm3E. Not enough information is given.

The density of a particular stainless steel alloy is 0.279 lb/in3 at 20.0 °C. If a ball bearing made of this alloy weighs 8.28 g, what is the volume of the bearing in cm3?

The Earth’s oceans have an average depth of 3.6 x 10 8 cm, a total area of 3.6 x 10 8 km 2, and an average density of 5.8 x 10 -9 g/L of dissolved gold. How many grams of gold are in the oceans?

The proton has a radius of 1.0 x 10 -13 cm and a mass of 1.7 x 10 -24 g. Determine the density of a proton for a sphere. Volume is equal to (4/3) π r 3.A. 3.4 x 10 21 g/cm 3B. 1.7 x 10 39 g/cm 3C. 5.9 x 10 12 g/cm 3D. 4.1 x 10 14 g/cm 3

The density of lead is 11.4 g/cm3 at 25oC. The volume occupied by 25.0 g of lead isa. 2.19 cm3b. 1.24 cm3c. 0.456 cm3d. 285 cm3e. 6.05 cm3

A sample of 37.5 g of an unknown metal is placed in a graduated cylinder containing water. The levels of the water before and after adding the sample are 7.0 and 20.5 mL respectively. What is the density of this metal in g/L?

The density of magnesium is 1.7 g/cm3, while that of iron is 7.9 g/cm3. A block of iron has a mass of 819 g. What is the mass of a block of magnesium that has the same volume as the block of iron?A) 4.7 gB) 1.8 x 102 g C) 3.8 x 102 g D) 4.8 x 103 gE) 8 x 103 g

Precious metals and gems are measured in troy weights in the English system:24 grains = 1 pennyweight (exact)20 pennyweight = 1 troy ounce (exact)12 troy ounces = 1 troy pound (exact)1 grain = 0.0648 gram1 carat = 0.200 gram c. The density of gold is 19.3 g/cm3. What is the volume of a troy pound of gold?

A rectangular wooden block, 22 cm x 13.2 cm x 4.4 cm, has a mass of 1562.0 g. The density of the wood in kg/m3 is:A) 1.2 x 10-1 kg/m3B) 1.2 x 102 kg/m3C) 1.2 x 103 kg/m3D) 1.2 x 109 kg/m3E) 8.2 x 10-4 kg/m3

How many 1 -cm squares would it take to construct a square that is 1 m on each side?

How many 1-cm cubes would it take to construct a cube that is 4 cm on edge?

A bottle can hold 250 g of water but only 89.75 g of ether. What is the density of ether in g/cm3? (The density of water is 1.00 g/cm3.)A) 160.3 g/cm3B) 250.0 g/cm3C) 696 g/cm3D) 0.359 g/cm3E) 2.79 g/cm3

A titanium bicycle frame displaces 0.314 L of water and has a mass of 1.41 kg. What is the density of the titanium in g/cm3?

A supposedly gold nugget is tested to determine its density. It is found to displace 19.3 mL of water and has a mass of 371 grams. Could the nugget be made of gold?

Ethylene glycol (antifreeze) has a density of 1.11 g/ cm 3. What is the mass in g of 417 mL of this liquid?

Ethylene glycol (antifreeze) has a density of 1.11 g/ cm 3. What is the volume in L of 4.1 kg of this liquid?

An osmium sphere contains 1.289 x 10 23 osmium atoms and has a radius 0.755 cm. The molar mass of osmium is 190.23 g•mol-1. What is the density of osmium? Recall that the volume of a sphere is given by the formula: 4/3 π r 3a. 22.6 g/cm 3 b. 6.24 g/cm 3c. 1.80 g/cm 3d. 0.822 g/cm 3

A material will float on the surface of a liquid if the material has a density less than that of the liquid. Given that the density of water is approximately 1.0 g/mL, will a block of material having a volume of 1.2 x 104 in3 and weighing 350 lb float or sink when placed in a reservoir of water?

For a material to float on the surface of water, the material must have a density less than that of water (1.0 g/mL) and must not react with the water or dissolve in it. A spherical ball has a radius of 0.50 cm and weighs 2.0 g. Will this ball float or sink when placed in water? (Note: Volume of a sphere = 4/3πr3.)

A thief uses a can of sand to replace a solid gold cylinder that sits on a weight-sensitive, alarmed pedestal. The can of sand and the gold cylinder have exactly the same dimensions (length = 22 cm and radius = 3.8 cm). a. Calculate the mass of each cylinder (ignore the mass of the can itself). (density of gold = 19.3 g/cm3, density of sand = 3.00 g/cm3)b. Did the thief set off the alarm? Explain.

A star is estimated to have a mass of 2 x 1036 kg. Assuming it to be a sphere of average radius 7.0 x 105 km, calculate the average density of the star in units of grams per cubic centimeter.

A rectangular block has dimensions 2.9 cm x 3.5 cm x 10.0 cm. The mass of the block is 615.0 g. What are the volume and density of the block?

Diamonds are measured in carats, and 1 carat = 0.200 g. The density of diamond is 3.51 g/cm3.a. What is the volume of a 5.0-carat diamond?

A sample containing 33.42 g of metal pellets is poured into a graduated cylinder initially containing 12.7 mL of water, causing the water level in the cylinder to rise to 21.6 mL. Calculate the density of the metal.

The density of pure silver is 10.5 g/cm3 at 20°C. If 5.25 g of pure silver pellets is added to a graduated cylinder containing 11.2 mL of water, to what volume level will the water in the cylinder rise?

A steel cylinder has a length of 2.16 in, a radius of 0.22 in, and a mass of 41 g. What is the density of the steel in g/cm3?

At room temperature (20°C) and pressure, the density of air is 1.189 g/L. An object will float in air if its density is less than that of air. In a buoyancy experiment with a new plastic, a chemist creates a rigid, thin-walled ball that weighs 0.12 g and has a volume of 560 cm3.Will it float if filled with nitrogen (d = 1.165 g/L)?

Using Table R‑5, calculate the volume of 25.0 g of each of the following substances at 1 atm.c. ironChapter 8 discusses the properties of gases. One property unique to gases is that they contain mostly empty space. Explain, using the results of your calculations.

At room temperature (20°C) and pressure, the density of air is 1.189 g/L. An object will float in air if its density is less than that of air. In a buoyancy experiment with a new plastic, a chemist creates a rigid, thin-walled ball that weighs 0.12 g and has a volume of 560 cm3.For any case in which the ball will float, how much weight must be added to make it sink?

Earth’s oceans have an average depth of 3800 m, a total surface area of 3.63 x 10 8 km2, and an average concentration of dissolved gold of 5.8 x 10 −9 g/L. How many grams of gold are in the oceans?

Earth’s oceans have an average depth of 3800 m, a total surface area of 3.63 x 10 8 km2, and an average concentration of dissolved gold of 5.8 x 10 −9 g/L. How many cubic meters of gold are in the oceans?

Earth’s oceans have an average depth of 3800 m, a total surface area of 3.63 x 10 8 km2, and an average concentration of dissolved gold of 5.8 x 10 −9 g/L. Assuming the price of gold is $1595/troy oz, what is the value of gold in the oceans (1 troy oz = 31.1 g; d of gold = 19.3 g/cm3)?

Acetone (nail polish remover) has a density of 0.7857 g/cm3.What is the mass, in grams, of 28.62 mL of acetone?

Acetone (nail polish remover) has a density of 0.7857 g/cm3.What is the volume, in milliliters, of 6.60 g of acetone?

Liquid nitrogen is obtained from liquefied air and is used industrially to prepare frozen foods. It boils at 77.36 K. At the boiling point, the density of the liquid is 809 g/L and that of the gas is 4.566 g/L. How many liters of liquid nitrogen are produced when 895.0 L of nitrogen gas is liquefied at 77.36 K?

Precious metals and gems are measured in troy weights in the English system:24 grains = 1 pennyweight (exact)20 pennyweight = 1 troy ounce (exact)12 troy ounces = 1 troy pound (exact)1 grain = 0.0648 gram1 carat = 0.200 gramc. The density of gold is 19.3 g/cm3. What is the volume of a troy pound of gold?

Backpackers often use canisters of white gas to fuel a cooking stove’s burner. If one canister contains 1.75 L of white gas, and the density of the gas is 0.720 g/cm3 , how many kilograms of fuel are in one canister?

The gas tank of a certain luxury automobile holds 22.3 gallons according to the owner’s manual. If the density of gasoline is 0.8206 g/mL, determine the mass in kilograms and pounds of the fuel in a full tank.

Is this ring genuine? (Platinum has a density of 21.4 g/cm3.)

A woman buys a platinum ring that has a mass of 4.23 g and a volume of 0.198 cm3 . Calculate the density of the ring.

As an instructor is preparing for an experiment, he requires 225 g phosphoric acid. The only container readily available is a 150-mL Erlenmeyer flask. Is it large enough to contain the acid, whose density is 1.83 g/mL?

An empty vial weighs 55.32 g. How much would the vial weigh if it were filled with the same volume of water (d = 0.997 g/cm3 at 25°C)?

An empty Erlenmeyer flask weighs 241.3 g. When filled with water (d = 1.00 g/cm 3), the flask and its contents weigh 489.1 g. How much does the flask weigh when filled with the same volume of chloroform (d = 1.48 g/cm3)?

A cube of osmium metal 1.500 cm on a side has a mass of 76.31 g at 25 oC.The density of titanium metal is 4.51 g/cm3 at 25 oC. What mass of titanium displaces 66.0 mL of water at 25 oC?

After the label fell off a bottle containing a clear liquid believed to be benzene, a chemist measured the density of the liquid to verify its identity. A 25.0-mL portion of the liquid had a mass of 21.95 g. A chemistry handbook lists the density of benzene at 15oC as 0.878 g/mL. Is the calculated density in agreement with the tabulated value?

An experiment requires 16.0 g of cyclohexane, which has a density of 0.7781 g/mL at 25oC. What volume of cyclohexane should be used?

A drop of gasoline has a mass of 25 mg and a density of 0.741 g/cm3 . What is its volume in cubic centimeters?

Mercury poisoning is a debilitating disease that is often fatal. In the human body, mercury reacts with essential enzymes leading to irreversible inactivity of these enzymes. If the amount of mercury in a polluted lake is 0.4 μg Hg/mL, what is the total mass in kilograms of mercury in the lake? (The lake has a surface area of 100 mi2 and an average depth of 20 ft.)

Carbon monoxide (CO) detectors sound an alarm when peak levels of carbon monoxide reach 100 parts per million (ppm). This level roughly corresponds to a composition of air that contains 400,000 μg carbon monoxide per cubic meter of air (400,000 μg/m3). Assuming the dimensions of a room are 18 ft x 12 ft x 8 ft, estimate the mass of carbon monoxide in the room that would register 100 ppm on a carbon monoxide detector.

Calculate the density of aluminum if 27.6 cm3 has a mass of 74.6 g.

Osmium is one of the densest elements known. What is its density if 2.72 g has a volume of 0.121 cm3 ?

Glycerol is a syrupy liquid often used in cosmetics and soaps. A 3.25-L sample of pure glycerol has a mass of 4.10 x 103 g. What is the density of glycerol in g/cm3?

Calculate these masses. (a) What is the mass of 6.00 cm3 of mercury, density = 13.5939 g/cm3 ?

Calculate these masses.(b) What is the mass of 25.0 mL octane, density = 0.702 g/cm3 ?

Human fat has a density of 0.918 g/cm3.How much volume (in cm3) is gained by a person who gains 11.5 lb of pure fat?

If the mass of the bar is 104.7 g, how many significant figures should be reported when its density is calculated using the calculated volume?

Calculate these masses. (a) What is the mass of 4.00 cm3 of sodium, density = 0.97 g/cm3 ?

Calculate these masses.(b) What is the mass of 125 mL gaseous chlorine, density = 3.16 g/L?

Calculate these volumes. (a) What is the volume of 25 g iodine, density = 4.93 g/cm3 ?

Calculate these volumes.(b) What is the volume of 3.28 g gaseous hydrogen, density = 0.089 g/L?

To identify a liquid substance, a student determined
its density. Using a graduated cylinder, she measured out
a 45-mL sample of the substance. She then measured the mass of the sample, finding that it weighed 38.5 g. She knew that the substance had to be either isopropyl alcohol (density 0.785 g/mL ) or toluene (density 0.866 g/mL ).What is the calculated density of the substance?

Because zinc has nearly the same atomic radius as copper (d = 8.95 g/cm3 ), zinc atoms substitute for some copper atoms in the many types of brass. Calculate the density of the brass with (a) 10.0 atom % Zn and

The active ingredient of aspirin tablets is acetylsalicylic acid, which has a density of 1.4 g/cm3. In a lab class, a student used paper chromatography to isolate another common ingredient of headache remedies. The isolated sample had a mass of 0.384 g and a volume of 0.32 cm3. Given the data in the following table, what was the other ingredient in the headache remedy?

To identify a liquid substance, a student determined
its density. Using a graduated cylinder, she measured out
a 45-mL sample of the substance. She then measured the mass of the sample, finding that it weighed 38.5 g. She knew that the substance had to be either isopropyl alcohol (density 0.785 g/mL ) or toluene (density 0.866 g/mL ).An experiment requires 51.2 g of ethylene glycol, a liquid whose density is 1.114 g/mL. Rather than weigh the sample on a balance, a chemist chooses to dispense the liquid using a graduated cylinder. What volume of the liquid should be used?

Because zinc has nearly the same atomic radius as copper (d = 8.95 g/cm3 ), zinc atoms substitute for some copper atoms in the many types of brass. Calculate the density of the brass with(b) 38.0 atom % Zn.

To identify a liquid substance, a student determined
its density. Using a graduated cylinder, she measured out
a 45-mL sample of the substance. She then measured the mass of the sample, finding that it weighed 38.5 g. She knew that the substance had to be either isopropyl alcohol (density 0.785 g/mL ) or toluene (density 0.866 g/mL ).What is the probable identity of the substance?

To identify a liquid substance, a student determined
its density. Using a graduated cylinder, she measured out
a 45-mL sample of the substance. She then measured the mass of the sample, finding that it weighed 38.5 g. She knew that the substance had to be either isopropyl alcohol (density 0.785 g/mL ) or toluene (density 0.866 g/mL ).Is a graduated cylinder such as that shown on the left likely to afford the accuracy of measurement needed?

An individual suffering from a high cholesterol level in her blood has 245 mg of cholesterol per 100 mL of blood. If the total blood volume of the individual is 5.2 L , how many grams of total blood cholesterol does the individuals body contain?

Silicon for computer chips is grown in large cylinders called “boules” that are 300 mm in diameter and 2 m in length, as shown. The density of silicon is 2.33 g/cm3. Silicon wafers for making integrated circuits are sliced from a 2.0 m boule and are typically 0.75 mm thick and 300 mm in diameter.How
many wafers can be cut from a single boule?

Silicon for computer chips is grown in large cylinders called “boules” that are 300 mm in diameter and 2 m in length, as shown. The density of silicon is 2.33 g/cm3. Silicon wafers for making integrated circuits are sliced from a 2.0 m boule and are typically 0.75 mm thick and 300 mm in diameter.What is the
mass of a silicon wafer? (The volume of a cylinder is given by r2h, where r is the radius and h is its height.)

Gaseous hydrogen has a density of 0.0899 g/L at 0oC, and gaseous chlorine has a density of 3.214 g/L at the same temperature.How many liters of hydrogen would you need if you wanted 1.2502 g of hydrogen?

Gaseous hydrogen has a density of 0.0899 g/L at 0oC, and gaseous chlorine has a density of 3.214 g/L at the same temperature.How many liters of chlorine would you need if you wanted 35.05 g of chlorine?

In the opening scenes of the movie Raiders of the Lost Ark, Indiana Jones tries to remove a gold idol from a booby-trapped pedestal. He replaces the idol with a bag of sand of approximately equal volume. (Density of gold = 19.32 g/cm3; density of sand ≈ 2 g/cm3.)a. Did he have a reasonable chance of not activating the mass-sensitive booby trap?

In the opening scenes of the movie Raiders of the Lost Ark, Indiana Jones tries to remove a gold idol from a booby-trapped pedestal. He replaces the idol with a bag of sand of approximately equal volume. (Density of gold = 19.32 g/cm3; density of sand ≈ 2 g/cm3.)b. In a later scene he and an unscrupulous guide play catch with the idol. Assume that the volume of the idol is about 1.0 L. If it were solid gold, what mass would the idol have? Is playing catch with it plausible?

An empty vial weighs 55.32 g. If the vial weighs 185.56 g when filled with liquid mercury (d = 13.53 g/cm3), what volume of mercury is in the vial?

An empty Erlenmeyer flask weighs 241.3 g. When filled with water (d = 1.00 g/cm 3), the flask and its contents weigh 489.1 g. What is the volume of water in the flask?

Platinum, Pt, is one of the rarest metals. Worldwide annual production is only about 130 tons.Platinum has a density of 21.4 g/cm3. If thieves were to steal platinum from a bank using a small truck with a maximum payload of 900 lb, how many 1 L bars of the metal could they take?

Gold is alloyed (mixed) with other metals to increase its hardness in making jewelry.(a) Consider a piece of gold jewelry that weighs 9.85 g and has a volume of 0.675 cm3. The jewelry contains only gold and silver, which have densities of 19.3 and 10.5 g/cm3, respectively. If the total volume of the jewelry is the sum of the volumes of the gold and silver that it contains, calculate the percentage of gold (by mass) in the jewelry. (b) The relative amount of gold in an alloy is commonly expressed in units of karats. Pure gold is 24-karat, and the percentage of gold in an alloy is given as a percentage of this value. For example, an alloy that is 50% gold is 12-karat. State the purity of the gold jewelry in karat.

Consider the two spheres shown here, one made of silver and
the other of aluminum.What is the mass of the aluminum sphere
in kg?

These organic solvents are used to clean compact discs:If a 15.00-mL sample of CD cleaner weighs 11.775 g at 20°C, which solvent does the sample most likely contain?

Diamonds are measured in carats, and 1 carat = 0.200 g. The density of diamond is 3.51 g/cm3. a. What is the volume of a 5.0-carat diamond?

Diamonds are measured in carats, and 1 carat = 0.200 g. The density of diamond is 3.51 g/cm3. b. What is the mass in carats of a diamond measuring 2.8 mL?

Sterling silver is a solid solution of silver and copper. If a piece of a sterling silver necklace has a mass of 105.0 g and avolume of 10.12 mL, calculate the mass percent of copper in the piece of necklace. Assume that the volume of silver present plus the volume of copper present equals the total volume. Refer to Table R-5.

Ethanol and benzene dissolve in each other. When 100. mL of ethanol is dissolved in 1.00 L of benzene, what is the mass of the mixture? (See Table R‑5.)

What is the mass of a 2.75 L sample of a liquid that has a density of 0.950 g/mL ?

A 40-lb container of peat moss measures 14in 20lb 30 gal. A 40-lb container of topsoil has a volume of 1.9 {
m gal}.Would it be correct to say that peat moss is "lighter" than topsoil? Explain.

In each of the following pairs, which has the greater mass? (See Table R‑5.)a. 1.0 kg of feathers or 1.0 kg of lead

In each of the following pairs, which has the greater mass? (See Table R‑5.)b. 1.0 mL of mercury or 1.0 mL of water

In each of the following pairs, which has the greater mass? (See Table R‑5.)c. 19.3 mL of water or 1.00 mL of gold

In each of the following pairs, which has the greater mass? (See Table R‑5.)d. 75 mL of copper or 1.0 L of benzene

a. Calculate the mass of ethanol in 1.50 qt of ethanol. (See Table R‑5.)

b. Calculate the mass of mercury in 3.5 in3 of mercury. (See Table R‑5.)

Electrodes used in electrocardiography are disposable, and many of them incorporate silver. The metal is deposited in a thin layer on a small plastic “button,” and then some is converted to AgCl:Ag(s) + Cl−(aq) ⇌ AgCl(s) + e −(a) If the surface area of the button is 2.0 cm2 and the thickness of the silver layer is 7.5×10−6 m, calculate the volume (in cm3) of Ag used in one electrode.(b) The density of silver metal is 10.5 g/cm3. How many grams of silver are used per electrode?

At room temperature (20°C) and pressure, the density of air is 1.189 g/L. An object will float in air if its density is less than that of air. In a buoyancy experiment with a new plastic, a chemist creates a rigid, thin-walled ball that weighs 0.12 g and has a volume of 560 cm3.Will the ball float if it is evacuated?

Using Table R‑5, calculate the volume of 25.0 g of each of thefollowing substances at 1 atm.a. hydrogen gasChapter 8 discusses the properties of gases. One property unique to gases is that they contain mostly empty space. Explain, using the results of your calculations.

At room temperature (20°C) and pressure, the density of air is 1.189 g/L. An object will float in air if its density is less than that of air. In a buoyancy experiment with a new plastic, a chemist creates a rigid, thin-walled ball that weighs 0.12 g and has a volume of 560 cm3.Will it float if filled with carbon dioxide (d = 1.830 g/L)?

At room temperature (20°C) and pressure, the density of air is 1.189 g/L. An object will float in air if its density is less than that of air. In a buoyancy experiment with a new plastic, a chemist creates a rigid, thin-walled ball that weighs 0.12 g and has a volume of 560 cm3.Will it float if filled with hydrogen (d = 0.0899 g/L)?

More sulfuric acid (density = 1.8302 g/cm3) is produced than any other chemical-approximately 3.6 x 1011 lb/yr worldwide.What is the volume of this amount in liters?

Using Table R‑5, calculate the volume of 25.0 g of each of the following substances at 1 atm.b. waterChapter 8 discusses the properties of gases. One property unique to gases is that they contain mostly empty space. Explain, using the results of your calculations.

Imagine that you place a cork measuring 1.30 cm x 5.50 cm x 3.00 cm in a pan of water and that on top of the cork you place a small cube of lead measuring 1.15 cm on each edge. The density of cork is 0.235 g/cm3{
m g/cm^3}, and the density of lead is 11.35 g/cm3{
m g/cm^3}. Will the combination of cork plus lead float or sink?

Benzoic acid, C6H5COOH, melts at 122 oC. The density in the liquid state at 130 oC is 1.08 g/cm3. The density of solid benzoic acid at 15 oC is 1.266 g/cm3.In which of these two states is the average distance between molecules greater?

Benzoic acid, C6H5COOH, melts at 122 oC. The density in the liquid state at 130 oC is 1.08 g/cm3. The density of solid benzoic acid at 15 oC is 1.266 g/cm3.If you converted a cubic centimeter of liquid benzoic acid into a solid, would the solid take up more or less volume than the original cubic centimeter of liquid?

Three spheres of equal volume are composed of aluminum (density = 2.70 g/cm3), silver (density = 10.49 g/cm3), and nickel (density = 8.90 g/cm3). List the spheres from heaviest to lightest.

Three cubes of equal mass are composed of gold (density = 19.32 g/cm3), platinum (density = 21.45 g/cm3), and lead (density = 11.35 g/cm3). List the cubes from largest to smallest volume.

Each of the beakers depicted below contains two liquids that do not dissolve in each other. Three of the liquids are designated A, B, and C, and water is designated W. If the densities of W, C, and A are 1.0 g/mL, 0.88 g/mL, and 1.4 g/mL, respectively, which of the following densities is possible for liquid B: 0.79 g/mL, 0.86 g/mL, 0.94 g/mL, or 1.2 g/mL?

The liquid substances mercury (density = 13.6 g/mL), water (1.00 g/mL), and cyclohexane (0.778 g/mL) do not form a solution when mixed; instead, they separate in distinct layers. List how the liquids would position themselves in a test tube.

For each of the following, decide whether the orange block is more dense, the blue block is more dense, or it cannot be determined. Explain your answers.a.

For each of the following, decide whether the orange block is more dense, the blue block is more dense, or it cannot be determined. Explain your answers.b.

For each of the following, decide whether the orange block is more dense, the blue block is more dense, or it cannot be determined. Explain your answers.c.

For each of the following, decide whether the orange block is more dense, the blue block is more dense, or it cannot be determined. Explain your answers.d.

A 25.0-g sample of each of three unknown metals is added to 25.0 mL of water in graduated cylinders A, B, and C, and the final volumes are depicted in the circles below. Given their densities, identify the metal in each cylinder: zinc (7.14 g/mL), iron (7.87 g/mL), or nickel (8.91 g/mL).

Each of the beakers depicted below contains two liquids that do not dissolve in each other. Three of the liquids are designated A, B, and C, and water is designated W. Which of the liquids is (are) more dense than water and less dense than water?

Three samples, each of a different substance, are weighed and their volume is measured. The results are tabulated below. List the substances in order of decreasing density.MassVolumeSubstance I10.0 g10.0 mLSubstance II10.0 kg12.0 LSubstance III12.0 mg10.0 mu {
m L}

In each of the following pairs, which has the greater volume?a. 1.0 kg of feathers or 1.0 kg of lead

In each of the following pairs, which has the greater volume?b. 100 g of gold or 100 g of water

In each of the following pairs, which has the greater volume?c. 1.0 L of copper or 1.0 L of mercury

Find the radius (r) of an aluminum cylinder that is 2.20 cm long and has a mass of 12.6 g . For a cylinder, V =r2l. (The density of aluminum is 2.70 g/cm3.)

A package of aluminum foil contains 50. ft2 of foil, which weighs approximately 8.0 oz. Aluminum has a density of 2.70 g/cm3. What is the approximate thickness of the foil in millimeters?

The radius of a neon atom is 69 pm, and its mass is 3.35 x 10-23 g. What is the density of the atom in grams per cubiccentimeter (g/cm3)? Assume the nucleus is a sphere with volume = 4/3πr3.

A spherical ball of lead has a diameter of 5.5 cm . What is the mass of the sphere if lead has a density of 11.34 g/cm3? (The volume of a sphere is r3 where r is the radius.)

For a material to float on the surface of water, the material must have a density less than that of water (1.0 g/mL) andmust not react with the water or dissolve in it. A spherical ball has a radius of 0.50 cm and weighs 2.0 g. Will this ball float or sink when placed in water? (Note: Volume of a sphere = 4/3πr3.)

A steel ball-bearing with a circumference of 32.5 mm weighs 4.20 g. What is the density of the steel in g/cm3 (V of a sphere = 4/3 πr3 ; circumference of a circle = 2πr)?

A star is estimated to have a mass of 2 x 1036 kg. Assuming it to be a sphere of average radius 7.0 x 105 km, calculate the average density of the star in units of grams per cubic centimeter.

According to the Official Rules of Baseball, a baseball must have a circumference not more than 9.25 in or less than 9.00 in and a mass not more than 5.25 oz or less than 5.00 oz. What range of densities can a baseball be expected to have? Express this range as a single number with an accompanying uncertainty limit.

A thief plans to steal a gold sphere with a radius of 28.5 cm from a museum. If the gold has a density of 19.3 g/cm3, what is the mass of the sphere in pounds? [The volume of a sphere is V = (4/3) r3.]Is the thief likely to be able to walk off with the gold sphere unassisted?

A solid metal sphere has a radius of 3.61 cm and a mass of 1.760 kg . What is the density of the metal in g/cm3? (The volume of sphere is large{V = frac{4}{3}pi r^3}.)

Calculate the density of the 2412 Mg nucleus in g/mL, assuming that it has the typical nuclear diameter of 1 × 10–13 cm and is spherical in shape.

A large piece of jewelry has a mass of 132.6 g. A graduated cylinder initially contains 48.6 mL water. When the jewelry is submerged in the graduated cylinder, the total volume increases to 61.2 mL.(b) Assuming that the jewelry is made from only one substance, what substance is it likely to be? Explain

A titanium bicycle frame displaces 0.314 L of water and has a mass of 1.41 kg.What is the density of the titanium?

A large piece of jewelry has a mass of 132.6 g. A graduated cylinder initially contains 48.6 mL water. When the jewelry is submerged in the graduated cylinder, the total volume increases to 61.2 mL.(a) Determine the density of this piece of jewelry.

A 25.00-g sample of a solid is placed in a graduated cylinder and then the cylinder is filled to the 50.0-mL mark with benzene. The mass of benzene and solid together is 58.80 g. Assuming that the solid is insoluble in benzene and that the density of benzene is 0.880 g/cm3, calculate the density of the solid.

You are asked to determine the mass of a piece of copper using its reported density, 8.96 g/mL, and a 150-mL graduated cylinder. First, you add 105 mL of water to the graduated cylinder; then you place the piece of copper in the cylinder and record a volume of 137 mL. What is the mass of the copper reported with the correct number of significant figures?

The density of an irregularly shaped object was determined as follows. The mass of the object was found to be 28.90 g + 0.03 g. A graduated cylinder was partially filled with water. The reading of the level of the water was 6.4 cm3 + 0.1 cm3. The object was dropped in the cylinder, and the level of the water rose to 9.8 cm3 + 0.1 cm3. What is the density of the object, with appropriate error limits? (See Appendix 1.5.)

A sample containing 33.42 g of metal pellets is poured into a graduated cylinder initially containing 12.7 mL of water, causing the water level in the cylinder to rise to 21.6 mL. Calculate the density of the metal.

The density of pure silver is 10.5 g/cm3 at 20°C. If 5.25 g of pure silver pellets is added to a graduated cylinder containing 11.2 mL of water, to what volume level will the water in the cylinder rise?

An experiment was performed in which an empty 100-mL graduated cylinder was weighed. It was weighed once againafter it had been filled to the 10.0-mL mark with dry sand. A 10-mL pipet was used to transfer 10.00 mL of methanol to the cylinder. The sand–methanol mixture was stirred until bubbles no longer emerged from the mixture and the sand looked uniformly wet. The cylinder was then weighed again. Use the data obtained from this experiment (and displayed at the end of this problem) to find the density of the dry sand, the density of methanol, and the density of sand particles. Does the bubbling that occurs when the methanol is added to the dry sand indicate that the sand and methanol are reacting?Mass of cylinder plus wet sand 45.2613 gMass of cylinder plus dry sand 37.3488 gMass of empty cylinder 22.8317 gVolume of dry sand 10.0 mLVolume of sand plus methanol 17.6 mLVolume of methanol 10.00 mL

The density of osmium (the densest metal) is 22.57 g/cm3. If a 1.00-kg rectangular block of osmium has two dimensions of 4.00 cm x 4.00 cm, calculate the third dimension of the block.

Find the density, in g/cm3, of a metal cube with a mass of 52.6 g and an edge length (l) of 2.65 cm . For a cube, V= l3.

A cube of osmium metal 1.500 cm on a side has a mass of 76.31 g at 25 oC.What is its density in g/cm3 at this temperature?

A cube of osmium metal 1.500 cm on a side has a mass of 76.31 g at 25 oC.The density of benzene at 15 oC is 0.8787 g/mL. Calculate the mass of 0.1500 L of benzene at this temperature.

A metal cube has an edge length of 11.4 mm and a mass of 6.67 g .Density of Common Substancesat 20 oCSubstanceDensity(g/cm3)Charcoal (from oak)0.57Ethanol0.789Ice0.917 (at 0oC)Water1.00 (at 0oC)Sugar (sucrose)1.58Table salt (sodium chloride)2.16Glass2.6Aluminum2.70Titanium4.51Iron7.86Copper8.96Lead11.4Mercury13.55Gold19.3Platinum21.4Calculate the density of the metal.

A metal cube has an edge length of 11.4 mm and a mass of 6.67 g .Density of Common Substancesat 20 oCSubstanceDensity(g/cm3)Charcoal (from oak)0.57Ethanol0.789Ice0.917 (at 0oC)Water1.00 (at 0oC)Sugar (sucrose)1.58Table salt (sodium chloride)2.16Glass2.6Aluminum2.70Titanium4.51Iron7.86Copper8.96Lead11.4Mercury13.55Gold19.3Platinum21.4Refer to the table to determine the likely identity of the metal.

To identify a liquid substance, a student determined
its density. Using a graduated cylinder, she measured out
a 45-mL sample of the substance. She then measured the mass of the sample, finding that it weighed 38.5 g. She knew that the substance had to be either isopropyl alcohol (density 0.785 g/mL ) or toluene (density 0.866 g/mL ).A cubic piece of metal measures 5.50 cm on each edge. If the metal is nickel, whose density is 8.90 g/cm3, what is the mass of the cube?

A material will float on the surface of a liquid if the material has a density less than that of the liquid. Given that the density of water is approximately 1.0 g/mL, will a block of material having a volume of 1.2 x 104 in3 and weighing 350 lb float or sink when placed in a reservoir of water?

A small cube of aluminum measures 15.6 mm on a side and weighs 10.25 g. What is the density of aluminum in g/cm3?

A rectangular block has dimensions 2.9 cm x 3.5 cm x 10.0 cm. The mass of the block is 615.0 g. What are the volume and density of the block?

An Olympic-size pool is 50.0 m long and 25.0 m wide.(a) How many gallons of water (d = 1.0 g/mL) are needed to fill the pool to an average depth of 4.8 ft?

An Olympic-size pool is 50.0 m long and 25.0 m wide.What is the mass (in kg) of water in the pool?

A copper wire (density = 8.96 g/cm3) has a diameter of 0.25 mm. If a sample of this copper wire has a mass of 22 g, how long is the wire?

A copper refinery produces a copper ingot weighing 150 lb.If the copper is drawn into wire whose diameter is 8.50 mm, how many feet of copper can be obtained from the ingot? The density of copper is 8.94 g/cm3.(Assume that the wire is a cylinder whose volume is V = r2 h, where r is its radius and h is its height or length.)

A cylindrical tube 9.5 cm high and 0.85 cm in diameter is used to collect blood samples. How many cubic decimeters (dm3) of blood can it hold (V of a cylinder = πr2h)?

Copper can be drawn into thin wires. How many meters of 34-gauge wire (diameter = 6.304 x 10−3 in) can be produced from the copper in 5.01 lb of covellite, an ore of copper that is 66% copper by mass? (Hint: Treat the wire as a cylinder: V of cylinder = πr2h; d of copper = 8.95 g/cm3.)

A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. When the same flask is filled with concentrated sulfuric acid, H2SO4, its mass is 1026.57 g. What is the density of concentrated sulfuric acid? (Assume water has a density of 1.000 g/mL at the temperature of the measurement.) A. 0.5435 g/cm3B. 1.598 g/cm3C. 1.729 g/cm3D. 1.840 g/cm3E. 1.992 g/cm3

Water (d = 1.0 g/mL) and methylene chloride (d = 1.34 g/mL) form a layer. True or false, water is the layer on top. True or false, 10.0 mL of water (d = 1.00 g/mL) is more massive (heavier) than 10.0 mL of methylene chloride (d = 1.34 g/mL).

Be sure to answer all parts.A graduated cylinder is filled to the 40.00-mL mark with a mineral oil. The masses of the cylinder before and after the addition of the mineral oil are 124.966 g and 159.446 g, respectively. In a separate experiment, a metal ball bearing of mass 21.882 g is placed in the cylinder and the cylinder is again filled to the 40.00-mL mark with the mineral oil. The combined mass of the ball bearing and mineral oil is 50.952 g. Calculate the density and radius of the ball bearing (volume of a sphere of radius r is 4/3πr3).

What is the mass of 1.00 cm3 of mercury? The density of mercury is 13.6 g/cm3.(i) None of the above (ii) 1.36 x 104 g (iii) 1.26 x 104 g (iv) 146 x 104 g (v) 1.56 x 104 g

Be sure to answer all parts.An empty Erlenmeyer flask weighs 229.4 g. When filled with water (d = 1.00 g/cm3), the flask and its contents weigh 572.2 g. (a) What is the volume of water in the flask? Enter your answer in scientific notation. (b) How much does the flask weigh when filled with the same volume of chloroform (d = 1.48 g/cm3)?

How many cubic centimeters (cm3) of olive oil have the same mass as 1.60 L of gasoline? (See the table (Figure 1)). Express your answer to two significant figures.

Determine the mass of an object that has a volume of 88.6 mL and a density of 0.85 g/mLa. 89.4 gb. 0.00959 gc. 87.8 gd. 104 ge. 75.3 g

An empty beaker weighs 26.27gWhen completely filed with water, the beaker and its contents have a total mass of 308.85 g. What does the beaker hold? Use m1.00 g/mL density water.How much would the beaker and its contents weigh if it was completely fled with mercury? The density of mercury is d 135 g/mL

What is the density of glass in g/cm3 if a sample weighing 27.61 g has a volume of 11.54 cm3.Express your answer using four significant figures.

Aluminum has a density of 2.709 g/mL. What is the volume of a 15.8 gram block of aluminum? 1) 42.8 mL 2) 2.709 mL 3) 0.0234 mL 4) 5.83 mL 5) 0.172 mL

A sample of metal has a mass of 22.01 g, and a volume of 5.98 mL. What is the density of this metal?

Aluminum, gold, and iron have densities of 2.7 g/cc, 19.2 g/cc, and 7.874 g/cc, respectively. Suppose 5.0 g of each metal were obtained. Match each picture with the correct metal. The cylinders are drawn to have the same widths but various heights and are not to scale.

A piece of silver metal has a mass of 2.920 g. If the density of silver is 10.5 g/cm3, what is the volume of the silver?

Acetone is a common solvent and has a density of 0.7899 g/mL. What volume of acetone, in mL has a mass of 4.15 g?

An ore sample has a mass of 43.02 g. When the sample is added to water in a graduated cylinder, the water rises to 52.5 mL from 44.5 mL. What is the density of this sample? (a) 5.1 g/mL (b) 5.3 g/mL (c) 5.0 g/mL (d) 5.4 g/mL

A small hot-air balloon is filled with 1.03 x 106 L of air (d = 1.20 g/L). As the air in the balloon is heated, it expands to 1.10 x 106 L. What is the density of the heated air in the balloon?

A granite sample has a density of 2.67 g/cm3. What is the mass of a granite block that measures 3.50 cm x 5.00 cm x 7.25 cm? (a) 345 g (b) 334 g (c) 350 g (d) 339 g

Acetone (fingernail-polish remover) has a density of 0.7857 g/cm3. What is the mass in grams of 12.86 mL of acetone? Express your answer to four significant figures and include the appropriate units. What is the volume in milliliters of 7.72 g of acetone? Express your answer to three significant figures and include the appropriate units.

A student measures 49.9 mL of concentrated nitric acid, which has a density of 1.50 g/mL. What is the mass of the acid? Express your answer in grams to three significant figures.

Enter your answer in the provided box.A metal ball-bearing with a circumference of 47.3 mm weighs 15.8 g. What is the density of the metal in g/cm3 (V of a sphere = (4/3)πr3; circumference of a circle = 2πr)?

A flask with a volume of 250.0 mL contains air with a density of 1.173 g/L. What is the mass of the air contained in the flask?

Bromine, a brick red liquid, has a specific gravity of 3.12. What is the volume occupied by 25.0 grams of bromine?a. 8.01 mlb. 11.7 mlc. 78.0 mld. 32.6 mLe. 2.48 ml

Ethanol is a common laboratory solvent and has a density of 0.789 g/ml. What is the mass, in grams, of 151 mL of ethanol?

Density is a physical property that rotates the mass of a substance to its volume. a) Calculate the density (in g/mL) of a liquid that has a mass of 0.125 g and a volume of 0.000275 L. b) Calculate the volume in milliliters of a 4.85-g sample of a solid with a density of 4.09 g/mL. c) Calculate the mass of a 0.269-mL, sample of a liquid with density 0.930 g/mL.

Acetone is a common solvent and has a density of 0 7899 g/mL. What volume of acetone, in ml, has a mass of 18.9 g?

What is the mass of 527 mL of a liquid that has a density of 0.680 g/mL? (i) 0.358 g (ii) 358 g (iii) 0.0013 g (iv) 775 g

Acetone (nail polish remover) has a density of 0.7857 g/cm3. Part AWhat is the mass, in grams, of 28.54 mL of acetone? Express your answer using four significant figures. Part BWhat is the volume, in milliliters, of 6.62 g of acetone?

A small cube of metal measures 15.8 mm on a side and weighs 56.1 g. What is the density of the metal in g/cm3?

E85 fuel is a mixture of 85% ethanol and 15% gasoline by volume.What mass in kilograms of E85 (d = 0.758 g/mL) can be contained in a 15.0 gal tank?

What volume of gold would be equal in mass to a piece of copper with a volume of 135.0 mL? The density of gold is 19.3 g/mL, the density of the copper is 8.96 g/mL.

Acetone is a common solvent and has a density of 0.7899 g/mL. What volume of acetone, in ml, has a mass of 19.8 g?

You need to determine the diameter of a piece of copper wire in mm. The wire is 1.445 g. The density of copper is 8.933 g/cm3.What is the diameter of the wire?What is the radius of the wire?

A 1.00-μm thick layer of gold is plated on a medallion that is 4.00 cm in diameter and 2.00 mm thick. What is the volume (cm3) of gold plated? If the density of gold is 19.3 g/cm3, what is the mass (grams) of the gold plated on the medallion?

The mineral galena is composed of lead(II) sulfide and has an average density of 7.46 g/cm3. (a) How many moles of lead(II) sulfide are in 8.32 ft3 of galena? (b) How many lead atoms are in 3.34 dm3 of galena? (Enter your answer in scientific notation.)

A piece of silver (Ag) metal weighing 194.3 g is placed in a graduated cylinder containing 242.0 mL of water. The volume of water now reads 260.5 mL. From these data calculate the density of silver. a. 10.503 g/mL b. 1.34 g/mL c. 0.926 g/mL d. 10.5 g/mLe. 10.50 g/mL

A 0.500 mL sample of a liquid is found to weigh 7.96 g. Calculate the density of the liquid in units of g/cm3 and g/mL. Be sure to answer all parts.

An empty beaker weighs 28.87 g. a) When completely filled with water, the beaker and its contents have a total mass of 37765 g. What volume does the beaker hold? Use d = 1.00 g/mL as the density of water.b) How much would the beaker and its contents weigh if it was completely filled with mercury? The density of mercury is d = 13.5 g/mL.

Complete the following conversions. 377 km/s = _____ cm/s Express your answer using three significant figures.

A student made a 5.30% (w/v) solution by dissolving 5.30 grams of sodium chloride (salt) in an appropriate volume of water. Assume the density of the water was 1.00 g/mL, and that there was no increase in volume when the salt was added to the water. Calculate the density of the resulting solution in g/mL.

A 250-mL glass bottle was filled with 242 mL of water at 20°C and tightly capped. It was then left outdoor overnight, where the average temperature was -5°C. Predict what would happen. The density of water at 2°C is 0.998 g/cm3 and that of ice at -5°C is 0.916 g/cm3.

An empty beaker weighs 42.15 g.a) When completely filed with water, the beaker and its contents have a total mass of 317.75 g. What volume does the beaker hold? Use d = 1.00 g/mL as the density of water.b) How much would the beaker and its contents weigh if it was completely filled with mercury? The density of mercury is d = 13.5 g/mL.

Rank the solvents according to their densities.