Practice: What volume in (µL) of 0.125 M HBr contains 0.170 moles HBr?

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Ever wonder how a mass amount such as moles can be converted into the volume amount of liters? Well, molarity serves as the bridge between moles and liters.

Example #1: Calculate the molarity of a solution prepared by dissolving 23.7 g NaOH in enough water to make 2.50 L of solution.

Example #2: How many grams of Na_{3}PO_{4} (MW: 163.94 g/mol) are present in 300.0 mL of a 0.550 M Na_{3}PO_{4 }solution?

Practice: What volume in (µL) of 0.125 M HBr contains 0.170 moles HBr?

Practice: Hypernatremia is a medical condition where a patient has high levels of sodium in their blood, and is the result of the body containing too little water. A patient has a measured sodium level of 165 mM. If 30.0 mL of their blood were drawn, what mass (in ng) of sodium would be present?

Practice: 2.64 grams of an unknown compound was dissolved in water to yield 150 mL of solution. The concentration of the solution was 0.075 M. What was the molecular weight of the substance?

Practice: A solution with a final volume of 750.0 mL was prepared by dissolving 30.00 mL of benzene (C_{6}H_{6}, density = 0.8787 g/mL) in dichloromethane. Calculate the molarity of benzene in the solution.

Determine the molarity of a solution formed by dissolving 0.468 g of MgI 2 in enough water to yield 50.0 mL of solution.
A. 0.0287 M
B. 0.0107 M
C. 0.0936 M
D. 0.0337 M
E. 0.0651 M

How many milliliters of a 0.184 M NaNO 3 solution contain 0.113 moles of NaNO3?
a. 885 mL
b. 614 mL
c. 326 mL
d. 163 mL
e. 20.8 mL

3.25 g of acetone (CH 3COCH3, 58.08 g/mol) are dissolved in water to make 125.00 mL of a solution. What is the molarity of the acetone?
a. 0.0560 M
b. 0.448 M
c. 0.560 M
d. 0.000448 M
e. Cannot be calculated from the information given.

Determine the mass (g) of solute required to form 25 mL of a 0.1881 M H 2O2 solution.
a) 0.031
b) 160
c) 0.31
d) 0.022
e) 0.16

Which diagram represents the most concentrated solution?

What mass of KBr is needed to make a 6.54 M solution in 25.00 mL ?
A. 19.5 g
B. 1.37 g
C. 0.151 g
D. 1.95 x 104 g

Determine the molarity of a solution formed by dissolving 97.7 g LiBr in enough water to yield 750.0 mL of solution.
A) 1.50 M
B) 1.18 M
C) 0.130 M
D) 0.768 M
E) 2.30 M

How many milligrams of NaCN are required to prepare 712 mL of 0.250 M NaCN?

What volume (in µL) of 0.100 M HBr contains 0.170 moles of HBr?

A 46.2-mL, 0.568 M calcium nitrate [Ca(NO3)2] solution is mixed with 80.5 mL of 1.396 M calcium nitrate solution. Calculate the concentration of the final solution.

If 4.49 g NaNO3 (molar mass = 85.0 g/mol) is dissolved in enough water to make 250.0 mL of solution, what is the molarity of the sodium nitrate solution?
a. 0.0180 M
b. 0.0528 M
c. 0.211 M
d. 0.0132 M
e. 18.0 M

If 5.15 g Fe(NO3)3 (molar mass = 241.9 g/mol) is dissolved in enough water to make exactly 150.0 mL of solution, what is the molar concentration of nitrate ion?
a. 0.0473 M
b. 0.0212 M
c. 0.142 M
d. 0.318 M
e. 0.426 M

What is the mass of potassium iodide (molar mass = 166.0 g/mol) in 50.0 mL of 5.75 x 10–2 M KI (aq)?
a. 288 g
b. 0.191 g
c. 0.00288 g
d. 0.477 g
e. 191 g

What would be the molarity of NaOH in a solution made by dissolving 57.2 g of NaOH in enough water to make a final volume of exactly 500 mL? The molar mass of NaOH is 40.01 g/mol?
A. 6.99 M
B. 14.3 M
C. 2.86 M
D. 5.71 M
E. 0.1092 M

How many liters of a 0.0550 M NaOH solution contain 0.163 moles of NaOH?
a) 3.37 L
b) 1.48 L
c) 8.97 L
d) 2.96 L
e) 1.12 L

Hydrochloric acid is widely used as a laboratory reagent, in refining ore for the production of tin and tantalum, and as a catalyst in organic reactions. Calculate the number of moles of HCl in 62.50 mL of 0.500 M hydrochloric acid.
(A) 0.03125 mol
(B) 0.125 mol
(C) 8 mol
(D) 31.25 mol
(E) 125 mol

What is the molarity of formaldehyde in a solution containing 0.300 g of formaldehyde (CH2O) per mL?
(A) 0.0000100 M
(B) 0.0100 M
(C) 0.100 M
(D) 1.00 M
(E) 10.0 M

How many grams of KMnO 4 are required to prepare 750.0 mL of a 0.125 M solution?
A. 11.4
B. 14.8
C. 15.2
D. 17.5
E. 27.5

An aqueous solution that is 42.0% of C 2H6 by mass has a density of 1.78 g/mL. What is the molarity of this solution?
a. 24.9 M
b. 0.0249 M
c. 1.40 M
d. 43.0 M
e. 0.052 M

How many grams of KOH are required to prepare a 250.0 mL solution of 0.50 M KOH? (K = 39.10 amu, O = 16.00 amu, H = 1.008 amu)
a. 16 g
b. 13 g
c. 11 g
d. 9.0 g
e. 7.0 g

How many grams of phosphoric acid are there in 175 mL of a 3.5 M solution of phosphoric acid (MW 98.00 g/mol)?
a) 0.61 g
b) 60 g
c) 21 g
d) 4.9 g
e) 610 g

Spongebob Squarepants dissolved 4.96 g HNO3 in enough water to make 269 mL of solution.What was the molarity of his solution?a) 3.41b) 0.293c) 0.0242d) 18.43e) 0.0184

What does this statement mean?2.35 M LiF

What is the molarity of a solution made by dissolving 8.56 g of sodium acetate in water and diluting to 750.0 mL?(A) 5.30 M(B) 0.139 M(C) 0.104 M(D) 0.0783 M

If you want to double the concentration of a solution, how could you do it?

(a) Is the concentration of a solution an intensive or an extensive property?

(a) Suppose you prepare 500 mL of a 0.10 M solution of some salt and then spill some of it. What happens to the concentration of the solution left in the container?

(b) Suppose you prepare 500 mL of a 0.10 M aqueous solution of some salt and let it sit out, uncovered, for a long time, and some water evaporates. What happens to the concentration of the solution left in the container?

(c) A certain volume of a 0.50 M solution contains 4.5 g of a salt. What mass of the salt is present in the same volume of a 2.50 M solution?

(b) How many moles of KMnO4 are present in 250 mL of a 0.0475 M solution?

(c) How many milliliters of 11.6 M HCl solution are needed to obtain 0.250 mol of HCl?

A person suffering from hyponatremia has a sodium ion concentration in the blood of 0.118 M and a total blood volume of 4.6 L. What mass of sodium chloride would need to be added to the blood to bring the sodium ion concentration up to 0.138 M, assuming no change in blood volume?

(a) How many grams of solute are present in 50.0 mL of 0.488 M K 2Cr2O7?

(b) If 4.00 g of (NH 4)2SO4 is dissolved in enough water to form 400 mL of solution, what is the molarity of the solution?

(c) How many milliliters of 0.0250 M CuSO4 contain 1.75 g of solute?

Pure acetic acid, known as glacial acetic acid, is a liquid with a density of 1.049 g/mL at 25°C. Calculate the molarity of a solution of acetic acid made by dissolving 20.00 mL of glacial acetic acid at 25°C in enough water to make 250.0 mL of solution.

Glycerol, C3H8O3, is a substance used extensively in the manufacture of cosmetics, foodstuffs, antifreeze, and plastics. Glycerol is a water-soluble liquid with a density of 1.2656 g/L at 15°C. Calculate the molarity of a solution of glycerol made by dissolving 50.000 mL glycerol at 15°C in enough water to make 250.00 mL of solution.

Calculate the molarity of each of these solutions. b. A 184.6-mg sample of K 2Cr2O7 is dissolved in enough water to make 500.0 mL of solution.

What mass of NaOH is contained in 250.0 mL of a 0.400 M sodium hydroxide solution?

If 10. g of AgNO3 is available, what volume of 0.25 M AgNO3 solution can be prepared?

An average human being has about 5.0 L of blood in his or her body. If an average person were to eat 32.0 g of sugar (sucrose, C12H22O11, 342.30 g/mol), and all that sugar were dissolved into the bloodstream, how would the molarity of the blood sugar change?

What volume of a 0.716 M KBr solution is needed to provide 30.5 g of KBr?A. 21.8 mLB. 42.7 mLC. 184 mLD. 357 mL

What number of grams of KBr are needed to prepare 50.0 mL a 0.716 M solution?A. 4.26 gB. 3.58 gC. 0.0358 gD. 4,260 gE. 0.00358 g

A solution of ammonia is made by dissolving 35 g NH 3 in 90.0 g of H2O. The density of the solution is 0.898 g/mL. What is the molarity of NH3?d = Mass / Volumea) 53 Mb) 0.39 Mc) 23 Md) 15 Me) not possible to calculate

How many liters of a 0.0550 M KCl solution contain 0.163 moles of KCl?
A) 1.12 L
B) 3.37 L
C) 8.97 L
D) 2.96 L
E) 1.48 L

How many moles of LiI are contained in 258.6 mL of 0.0296 M LiI solution?A) 8.74 × 10-3 molB) 1.31 × 10-3 molC) 1.14 × 10-3 molD) 3.67 × 10-3 molE) 7.65 × 10-3 mol

What volume, in liters, of a 2.00 M KCl solution contains 2.5 g of KCl? (Molar mass KCl = 74.55 g/mole)

What is the molarity of an NaOH solution which contains 24.0g of NaOH dissolved in 200mL of solution?

How many moles of Nal are in 23.0 mL of a 0.250 M solution?A. 0.250 moles NalB. 5.75 moles NalC. 0.00575 moles NalD. 0.0920 moles NalE. 10.9 moles Nal

Calculate the number of moles HCl in 62.85mL of 0.453 M hydrochloric acid.

What mass of FeCl2 is needed to prepare 750.0 mL of 2.00 M solution?(A) 47.6 g(B) 95.3 g(C) 127 g(D) 190.5 g(E) 190,500 g

Determine the mass (g) of solute required to form 275 mL of a 0.4230 M KClO 3 solution.a. 1.97b. 4.21c. 14.3d. 12.2e. 19.6

A scientist wants to make a solution of tribasic sodium phosphate, Na 3PO4, for a laboratory experiment. How many grams of Na 3PO4 will be needed to produce 575 mL of a solution that has a concentration of Na+ ions of 0.600 M ?

The concentration of distilled white vinegar is written as 5% (w/v) of acetic acid (CH3COOH). Convert the concentration in the unit of molarity. Express your answer in four significant figures.

Which of the solutions below have the same molar concentration as Solution X?

A chemist wants to make 5.0 L of a 0.260 M CaCl2 solution. What mass of CaCl2 (in g) should the chemist use?

The concentration of alcohol CH3CH2OH in blood, called the blood alcohol concentration or BAC, is given in units of grams of alcohol per 100mL of blood.What is the concentration of the alcohol, in terms of molarity in blood if the BAC is 0.08?

Hard water contains Ca2+, Mg2+, and Fe2+, which interfere with the action of soap and leave an insoluble coating on the insides of containers and pipes when heated. Water softeners replace these ions with Na+. If 1500 L of hard water contains 0.020 M Ca 2+, and 0.0040 M Mg2+, how many moles of Na+ are needed to replace these ions?

Calculate the molarity of a saturated solution of sodium hydrogen carbonate (baking soda), NaHCO3(aq) that contains 69.0 grams in 1.00 liter of solution.

A solution was prepared by dissolving 39.0 g of KCl in 225 mL of water. Calculate the molarity of KCl in the solution if the total volume of the solution is 239 mL.

Calculate the molarity of each of the following solutions.a. 0.50mol of LiNO3 in 6.50L of solutionb. 72.2g C2H6O in 2.43L of solutionc. 12.72 mg KI in 113.6 mL of solution

a. At 30°C , the molar solubility of barium sulfate in water is 1.2 x 10 -5 M . Calculate the solubility in grams per liter.b. How many liters of water are required to dissolve 1 g of barium sulfate?

Calculate the molarity of each of the following solutions.a. 0.41 mol of LiNO3 in 6.26 L of solutionb. 72.9 g C2H6O in 2.35 L of solutionc. 12.21 mg KI in 107.6 mL of solution

A solution of ethanol (C2H5OH) in water is prepared by dissolving 75.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution?

How many moles of solute particles are present in 1 mL of each of the following aqueous solutions? (c) 0.08 M pyridine (C5H5N)

How many grams of NaOH (MW = 40.0) are there in 350.0 mL of a 0.225 M NaOH solution?

38. A solution was prepared by mixing 50.00 mL of 0.100 M HNO 3 and 100.00 mL of 0.200 M HNO3. Calculate the molarity of the final solution of nitric acid.

What is the molarity of a solution that contains 17g of NH 3 in 0.50 L of solution.

A solution containing equal masses of glycerol (C3H8O3) and water has a density of 1.10 g/mL. Calculate the molarity of glycerol in the solution.

Commercial grade HCl solutions are typically 39.0% (by mass) HCl in water. Determine the molarity of the HCl, if the solution has a density of 1.20 g/mL.A) 13.9 M B) 12.8 M C) 10.7 M D) 9.35 M E) 7.79 M

A person suffering from hyponatremia has a sodium ion concentration of 0.118 M in his blood and has a total blood volume of 4.6 L. What mass of sodium chloride would need to be added to the blood to bring the sodium ion concentration to 0.138 M with no change in blood volume?

The molecular weight of ethanol (C2H5OH) is 46.1 and the density of absolute (100%) ethanol = 0.79 g/mLThe legal limit for a driver’s blood alcohol is 50 mg of ethanol per 100 mL of blood (referred to as a blood alcohol content (BAC) of 0.05%). What is the molarity of ethanol (in blood) in a person at this legal limit?

A chemist prepares a solution of aluminum chloride (AICI 3) by measuring out 24.6 g of aluminum chloride into a 250. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's aluminum chloride solution. Be sure your answer has the correct number of significant digits.

A chemist adds 470.0 mL of a 8.8 x 10 -5 mM silver(II) oxide (AgO) solution to a reaction flask. Calculate the mass in micrograms of silver(II) oxide the chemist has added to the flask. Round your answer to 2 significant digits.

Calculate the mass of KI in grams required to prepare 5.00 x 10 2 mL of a 1.5 M solution

How many moles of NaCl are required to make 250 mL of a 3.00 M solution?a. 750 molesb. 0.750 molesc. 0.250 molesd. 3 moles

Calculate the volume in liters of a 3.3 x 10 -4 μM magnesium fluoride solution that contains 400 mmol of magnesium fluoride (MgF2). Round your answer to 2 significant digits.

How many liters of a 0.0550 M LiF solution contain 0.163 moles of LiF?a. 8.97 Lb. 1.48 Lc. 3.37 Ld. 1.12 Le. 2.96 L

A student sets up and solves the following equation to solve a problem in solution stoichiometry. Fill in the missing part of the student's equation. (4.2 ) (0.30 L) (115.40 g/mol) = 1.5 x 10 2 g

Calculate the volume in milliliters of a 3.67 mol/L calcium bromide solution that contains 225 mmol of calcium bromide (CaBr2). Be sure your answer has the correct number of significant digits.

The molecular weight of ethanol (C2H5OH) is 46.1 and the density of absolute (100%) ethanol = 0.79 g/mLa) Calculate the molarity of absolute ethanol (100% ethanol).b) Calculate the molarity of ethanol in a bottle of wine that is 14.0% ethanol by volume.

Calculate the molarity of 0.400 mol of Na2S in 1.30 L of solution. Calculate the molarity of 21.1 g of MgS in 979 mL of solution.

When a 1.00 L sample of water from the surface of the Dead Sea (which is more than 400 meters below sea level and much saltier than ordinary seawater) is evaporated, 1.70 x 102 grams of MgCl2 are recovered. What is the molarity of MgCl 2 in the original sample?

Sodium hydroxide is extremely soluble in water. At a certain temperature, a saturated solution contains 571 g of NaOH(s) per liter of solution. Calculate the molarity of this saturated NaOH(aq) solution.

Calculate: How many grams of solid AgNO3 will be needed to prepare 250. mL of a 0.0500 M solution? How many grams of vitamin C (C6H8O6) would be contained in 45.0 mL of a 1.60 M solution? How many moles of HCl is contained in 450. ml of 3.5 M solution?

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