Chemistry Chemistry Practice Problems Solutions Library

Mass Percent Formula Solutions Library

Access 175 Mass Percent Formula video and text solutions to help you complete your homework. Need to revisit the concept? Watch our Mass Percent Formula learn videos.

Browse Solutions

175 solutions

Mass Percent Formula

Q. A solution is made containing 12.6 g of methanol CH 3OH (32.04 g/mol) in 154 g of water. H20 (18.02 g/mol)b) Calculate the mass percent of methanol...

Solved • Jan 20, 2020

Mass Percent Formula

Q. A hydrocarbon sample with a mass of 6.0 grams underwent combustion to produce 11.0 grams of carbon dioxide. If all the carbon initially present in ...

Solved • Nov 25, 2019

Mass Percent Formula

Q. Find the percent of KCl if a mixture of KCl and KNO3 is 44.2% potassium by mass.A. 12% B. 8% C. 20% D. 33% E. 40%

Solved • Oct 3, 2019

Mass Percent Formula

Q. Calculate the mass percent composition of lithium ion in Li 3PO4.a. 30.72 %b. 55.27 %c. 20.82 %d. 26.75 %e. 17.98 %

Solved • Sep 30, 2019

Mass Percent Formula

Q. What is the percent composition of chlorine in cobalt(II) chloride hexahydrate?A. 29.8%      B. 24.8%      C. 47.9%D. 39.8%      E. 54.6%

Solved • Sep 18, 2019

Mass Percent Formula

Q. Dimethylcadimum, Cd(CH3)2, is considered to be one of the most dangerous chemicals on Earth. It is volatile, poisonous, carcinogenic and explosive....

Solved • Sep 13, 2019

Mass Percent Formula

Q. What is the mass percent of oxygen in C14H19NO2?

Solved • Sep 1, 2019

Mass Percent Formula

Q. Which of the following compounds has the highest mass percent of O?a. Mn2O3b. MnOc. Mn3O2d. MnO2

Solved • Sep 1, 2019

Mass Percent Formula

Q. What is the mass percent of chlorine in hydrochloric acid?

Solved • Sep 1, 2019

Mass Percent Formula

Q. A 500 gram iron ore sample was determined to contain 242 grams of iron. What is the mass percent of iron in the ore?

Solved • Sep 1, 2019

Mass Percent Formula

Q. Calculating the mass percentages of the elements in benzene after calculating the molecular weight of benzene.

Solved • Aug 25, 2019

Mass Percent Formula

Q. Calculate the mass of oxygen in a molecule of  CO2 by using percentage composition?

Solved • Aug 7, 2019

Mass Percent Formula

Q. A certain metal hydroxide, M(OH)2, contains 32.8% oxygen by mass. What is the identity of the metal M? Please provide explanation and answer.

Solved • Aug 5, 2019

Mass Percent Formula

Q. Li-ion batteries used in automobiles typically use a LiMn2O4 cathode in place of the LiCoO2 cathode found in most Li-ion batteries.Calculate the ma...

Solved • Jan 3, 2019

Mass Percent Formula

Q. What mass of sucrose (C12H22O11), in grams, is contained in 355 mL (12 oz ) of a soft drink that is 11.5 % sucrose by mass? (Assume a density of 1....

Solved • Dec 3, 2018

Mass Percent Formula

Q. A potassium bromide solution is 7.55% potassium bromide by mass and its density is 1.03 g/mL. What mass of potassium bromide is contained in 35.8 m...

Solved • Dec 3, 2018

Mass Percent Formula

Q. Water softeners often replace calcium ions in hard water with sodium ions. Since sodium compounds are soluble, the presence of sodium ions in water...

Solved • Dec 3, 2018

Mass Percent Formula

Q. Silver nitrate solutions are often used to plate silver onto other metals.What is the maximum amount of silver (in grams) that can be plated out of...

Solved • Dec 3, 2018

Mass Percent Formula

Q. Despite Dalton’s laws, it is now known that many ionic compounds do not always contain atoms in small integer ratios. For example, a sample of iron...

Solved • Nov 27, 2018

Mass Percent Formula

Q. One of the best-selling light, or low-calorie, beers is 4.4 % alcohol by volume and a 12-oz serving contains 110 Calories; remember: 1 Calorie = 10...

Solved • Oct 31, 2018

Mass Percent Formula

Q. Glycine, an amino acid used by organisms to make proteins, is represented by the molecular model below.Calculate the percent nitrogen by mass in gl...

Solved • Oct 31, 2018

Mass Percent Formula

Q. Propenoic acid, C3H4O2, is a reactive organic liquid that is used in the manufacturing of plastics, coatings, and adhesives. An unlabeled container...

Solved • Oct 31, 2018

Mass Percent Formula

Q. Propenoic acid, C3H4O2, is a reactive organic liquid that is used in the manufacturing of plastics, coatings, and adhesives. An unlabeled container...

Solved • Oct 31, 2018

Mass Percent Formula

Q. Calculate the percentage of carbon by mass in each of the compounds represented by the following models. (Carbon atoms are black spheres, hydrogen ...

Solved • Oct 31, 2018

Mass Percent Formula

Q. Calculate the percentage of carbon by mass in each of the compounds represented by the following models. (Carbon atoms are black spheres, hydrogen ...

Solved • Oct 31, 2018

Mass Percent Formula

Q. The effectiveness of nitrogen fertilizers depends on both their ability to deliver nitrogen to plants and the amount of nitrogen they can deliver. ...

Solved • Oct 31, 2018

Mass Percent Formula

Q. The compound XCl4 contains 74.8% Cl by mass.What is the element X?

Solved • Oct 31, 2018

Mass Percent Formula

Q. Calculate the percentage by mass of oxygen in the following compounds.digitoxin, C41H64O13

Solved • Oct 31, 2018

Mass Percent Formula

Q. Calculate the percentage by mass of oxygen in the following compounds.vancomycin, C66H75Cl2N9O24

Solved • Oct 31, 2018

Mass Percent Formula

Q. Calculate the percentage by mass of the indicated element in the following compounds.Hydrogen in ascorbic acid, HC6H7O6, also known as vitamin C      

Solved • Oct 31, 2018

Mass Percent Formula

Q. Calculate the percentage by mass of the indicated element in the following compounds.Platinum in PtCl2(NH3)2, a chemotherapy agent called cisplatin...

Solved • Oct 31, 2018

Mass Percent Formula

Q. Calculate the percentage by mass of the indicated element in the following compounds.Oxygen in the female sex hormone estradiol, C18H24O2

Solved • Oct 31, 2018

Mass Percent Formula

Q. Based on the following structural formulas, calculate the percentage of carbon by mass present in each compound.

Solved • Oct 31, 2018

Mass Percent Formula

Q. Based on the following structural formulas, calculate the percentage of carbon by mass present in each compound.Vanillin (vanilla flavor)

Solved • Oct 31, 2018

Mass Percent Formula

Q. Calculate the percentage by mass of oxygen in the following compounds.morphine, C17H19NO3

Solved • Oct 31, 2018

Mass Percent Formula

Q. Calculate the percentage by mass of oxygen in the following compounds.codeine, C18H21NO3

Solved • Oct 31, 2018

Mass Percent Formula

Q. Calculate the percentage by mass of oxygen in the following compounds.cocaine, C17H21NO4

Solved • Oct 31, 2018

Mass Percent Formula

Q. Calculate the percentage by mass of oxygen in the following compounds.tetracycline, C22H24N2O8

Solved • Oct 31, 2018

Mass Percent Formula

Q. A compound isolated from the rind of lemons is found to be 88.14 % carbon and 11.86 % hydrogen by mass.How many grams of C are there in a 100.1-g s...

Solved • Oct 31, 2018

Mass Percent Formula

Q. A compound isolated from the rind of lemons is found to be 88.14 % carbon and 11.86 % hydrogen by mass.How many grams of H are there in a 100.1-g s...

Solved • Oct 31, 2018

Mass Percent Formula

Q. Acetic acid (HC2H3O2) is the active ingredient in vinegar. Calculate the mass percent composition of oxygen in acetic acid.

Solved • Oct 31, 2018

Mass Percent Formula

Q. Because of increasing evidence of damage to the ozone layer, chlorofluorocarbon (CFC) production was banned in 1996. However, many older cars still...

Solved • Oct 31, 2018

Mass Percent Formula

Q. Without doing any calculations, determine which element in each of the following compounds will have the highest mass percent composition.CO

Solved • Oct 31, 2018

Mass Percent Formula

Q. Most fertilizers consist of nitrogen-containing compounds such as NH3, CO(NH2 )2, NH4 NO3, and (NH4 )2 SO4. Plants use the nitrogen content in thes...

Solved • Oct 31, 2018

Mass Percent Formula

Q. The nitrogen in sodium nitrate and in ammonium sulfate is available to plants as fertilizer. Which is the more economical source of nitrogen, a fer...

Solved • Oct 31, 2018

Mass Percent Formula

Q. List the elements in the compound CF2Cl2 in order of decreasing mass percent composition.

Solved • Oct 31, 2018

Mass Percent Formula

Q. A mixture of CaCO3 and (NH4 )2 CO3 is 61.1 % CO3 by mass.Find the mass percent of CaCO3 in the mixture.

Solved • Oct 31, 2018

Mass Percent Formula

Q. A particular coal contains 2.55% sulfur by mass. When the coal is burned, it produces SO2 emissions which combine with rainwater to produce sulfuri...

Solved • Oct 31, 2018

Mass Percent Formula

Q. Phosphorus is obtained primarily from ores containing calcium phosphate.If a particular ore contains 57.1 % calcium phosphate, what minimum mass of...

Solved • Oct 31, 2018

Mass Percent Formula

Q. A mixture of NaCl and NaBr has a mass of 2.05 g and is found to contain 0.75 g of Na.What is the mass of NaBr in the mixture?

Solved • Oct 31, 2018

Mass Percent Formula

Q. Calculate the mass percent composition of each constituent element of cobalt(II) bromide.

Solved • Oct 31, 2018

Mass Percent Formula

Q. Calculate the mass percent composition of carbon in each the following carbon compounds.CH4

Solved • Oct 31, 2018

Mass Percent Formula

Q. Calculate the mass percent composition of carbon in each of the following carbon compounds.C2H5Cl

Solved • Oct 31, 2018

Mass Percent Formula

Q. Silver chloride, often used in silver plating, contains 75.27% Ag.Calculate the mass of silver chloride required to plate 215 mg of pure silver.

Solved • Oct 31, 2018

Mass Percent Formula

Q. Without doing any calculations, list the elements in C6H6O in order of decreasing mass percent composition.

Solved • Oct 31, 2018

Mass Percent Formula

Q. In 2009, a team from Northwestern University and Western Washington University reported the preparation of a new "spongy" material composed of nick...

Solved • Oct 25, 2018

Mass Percent Formula

Q. Common brass is a copper and zinc alloy containing 37.0% zinc by mass and having a density of 8.48 g/cm3. A fitting composed of common brass has a ...

Solved • Oct 25, 2018

Mass Percent Formula

Q. A substance X2Z has the composition (by mass) of 40.0% X and 60.0% Z. What is the composition (by mass) of the compound XZ2?

Solved • Oct 17, 2018

Mass Percent Formula

Q. Commercial brass, an alloy of Zn and Cu, reacts with hydrochloric acid as follows:Zn (s) + 2 HCl (aq) → ZnCl 2 (aq) + H2 (g) (Cu does not react wit...

Solved • Oct 17, 2018

Mass Percent Formula

Q. An iron ore sample contains Fe2O3 plus other impurities. A 752-g sample of impure iron ore is heated with excess carbon, producing 453 g of pure ir...

Solved • Oct 17, 2018

Mass Percent Formula

Q. A binary compound between an unknown element E and hydrogen contains 91.27% E and 8.73% H by mass. If the formula of the compound is E3H8. Calculat...

Solved • Oct 17, 2018

Mass Percent Formula

Q. Copper(I) iodide (CuI) is often added to table salt as a dietary source of iodine. How many moles of CuI are contained in 1.00 lb (454 g) of table ...

Solved • Oct 16, 2018

Mass Percent Formula

Q. A compound contains 47.08% carbon, 6.59% hydrogen, and 46.33% chlorine by mass; the molar mass of the compound is 153 g/mol. What are the empirical...

Solved • Oct 16, 2018

Mass Percent Formula

Q. A compound containing only sulfur and nitrogen is 69.6% S by mass; the molar mass is 184 g/mol. What are the empirical and molecular formulas of th...

Solved • Oct 16, 2018

Mass Percent Formula

Q. Determine the percent ammonia, NH3, in Co(NH3)6Cl3, to three significant figures.

Solved • Oct 16, 2018

Mass Percent Formula

Q. Express the composition of formaldehyde, CH2O, as the mass percents of its elements.

Solved • Oct 16, 2018

Mass Percent Formula

Q. The percent by mass of nitrogen for a compound is found to be 46.7%. Which of the following could be this species?

Solved • Oct 16, 2018

Mass Percent Formula

Q. Manganese is a key component of extremely hard steel. The element occurs naturally in many oxides. A 542.3-g sample of a manganese oxide has an Mn/...

Solved • Oct 16, 2018

Mass Percent Formula

Q. Fluorine is so reactive that it form compound with several of the noble gases.(c) Fluorides of xenon can be formed by direct reaction of the elemen...

Solved • Oct 16, 2018

Mass Percent Formula

Q. The seven most abundant ions in seawater make up more than 99% by mass of the dissolved compounds. Here are their abundances in units of mg ion/kg ...

Solved • Oct 12, 2018

Mass Percent Formula

Q. Ammonium dihydrogen phosphate, formed from the reaction of phosphoric acid with ammonia, is used as a crop fertilizer as well as a component of som...

Solved • Oct 12, 2018

Mass Percent Formula

Q. Hemoglobin, a protein in red blood cells, carries O 2 from the lungs to the body’s cells. Iron (as ferrous ion, Fe2+) makes up 0.33 mass % of hemog...

Solved • Oct 12, 2018

Mass Percent Formula

Q. Calculate the following:Mass fraction of Cl in calcium chlorate.

Solved • Oct 12, 2018

Mass Percent Formula

Q. Calculate the following:Mass fraction of C in cesium acetate.

Solved • Oct 12, 2018

Mass Percent Formula

Q. Calculate the following:Mass % of Mn in potassium permanganate.

Solved • Oct 12, 2018

Mass Percent Formula

Q. Calculate the following:Mass % of I in strontium periodate

Solved • Oct 12, 2018

Mass Percent Formula

Q. Calculate the following:Mass % of O in sodium dihydrogen phosphate heptahydrate.

Solved • Oct 12, 2018

Mass Percent Formula

Q. Galena, a mineral of lead, is a compound of the metal with sulfur. Analysis shows that a 2.34-g sample of galena contains 2.03 g of lead. Calculate...

Solved • Oct 11, 2018

Mass Percent Formula

Q. Fluorite, a mineral of calcium, is a compound of the metal with fluorine. Analysis shows that a 2.76-g sample of fluorite contains 1.42 g of calciu...

Solved • Oct 11, 2018

Mass Percent Formula

Q. The mass percent of sulfur in a sample of coal is a key factor in the environmental impact of the coal because the sulfur combines with oxygen when...

Solved • Oct 10, 2018

Mass Percent Formula

Q. Dolomite is a carbonate of magnesium and calcium. Analysis shows that 7.81 g of dolomite contains 1.70 g of Ca. Calculate the mass percent of Ca in...

Solved • Oct 10, 2018

Mass Percent Formula

Q. A student heated a 2.488 g sample of a hydrated iron chloride. After heating, the anhydrous iron chloride had a mass of 1.588 g. Calculate the perc...

Solved • Sep 24, 2018

Mass Percent Formula

Q. A phosphorus compound that contains 13.07% phosphorus by mass has the formula X3P2. Identify the element X. Express your answer as a chemical symbol.

Solved • Sep 17, 2018

Mass Percent Formula

Q. A doctor orders 0.070 g of chlorpromazine, which is used to treat schizophrenia. If the stock solution is 2.0% (m/v), how many millilitres are admi...

Solved • Jul 23, 2018

Mass Percent Formula

Q. The mass of solute per 100 mL of solution is abbreviated as (m/v). Mass is not technically the same thing as weight, but the abbreviation (w/v) is ...

Solved • Jul 17, 2018

Mass Percent Formula

Q. Isopropyl alcohol is mixed with water to produce a 38.0% (v/v) alcohol solution. How many milliliters of each component are present in 815 mL of th...

Solved • Jul 16, 2018

Mass Percent Formula

Q. How many grams of CaCl2 are needed to make 635.3 g of a solution that is 35.5% (mm) calcium chloride in water? Note that mass is not technically th...

Solved • Jul 16, 2018

Mass Percent Formula

Q. What is the mass percentage of a solution prepared by dissolving 15.1 g of sucrose, granulated sugar, in 500.0 mL of water? Assume a density of 1.0...

Solved • Jul 16, 2018

Mass Percent Formula

Q. How many grams of a 18.5% sugar solution contain 74.5 g of sugar?

Solved • Jul 11, 2018

Mass Percent Formula

Q. Calculate the percent by mass of O in pentaerythritol (C(CH2OH)4. Express your answer as a percentage. 

Solved • Jun 25, 2018

Mass Percent Formula

Q. Calculate the percent by mass of C in pentaerythritol (C(CH 2OH)4)  Express your answer as a percentage.

Solved • Jun 25, 2018

Mass Percent Formula

Q. Calculate the percent composition by mass of each element in Al(OH)3. Use at least three significant figures.%  Al = %  O =%  H = 

Solved • Jun 19, 2018

Mass Percent Formula

Q. What is the concentration in mass percent (w/w), of a solution prepared from 50.0 g NaCl and 150.0 g of water?a. 40.0%b. 0.250%c. 3.00%d. 25.0%e. 3...

Solved • Jun 18, 2018

Mass Percent Formula

Q. Calculate the concentration in %(w/w) of the following solutions. Assume water has a density of 1.00 g/mL. a. 4.9 g of sugar and 2.00 x 10 2 mL of ...

Solved • Jun 6, 2018

Mass Percent Formula

Q. Enter your answer in the provided box.A chemical engineer determines the mass percent of iron in an ore sample by converting the Fe to Fe2+ in acid...

Solved • May 30, 2018

Mass Percent Formula

Q. Determine the amount of potassium chloride in each solution. 20.1 g of a solution containing 1.04 % KCl by mass. Express your answer using three si...

Solved • May 21, 2018

Mass Percent Formula

Q. Determine amount of potassium chloride in each solution.A. 18.1 g of a solution containing 1.10% KCl by mass. Express your answer using three signi...

Solved • May 12, 2018

Mass Percent Formula

Q. What is the concentration of sodium in the soft drink in mass percent? Express your answer using two significant figures. 

Solved • May 12, 2018

Mass Percent Formula

Q. Calculate the percent composition of:Sodium sulfateDinitrogen tetroxide

Solved • Apr 9, 2018

Mass Percent Formula

Q. An oxybromate compound, KBrOx, where x is unknown, is analyzed and found to contain 43.66% Br. What is the value of x? Express your answer as an in...

Solved • Apr 6, 2018