Chemistry Chemistry Practice Problems Solutions Library

Stoichiometry Solutions Library

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461 solutions

Stoichiometry

Q. If an automobile travels 230 mi with a gas mileage of 21.5 mi/gal , how many kilograms of CO2 are produced?Assume that the gasoline is composed of ...

Solved • Oct 31, 2018

Stoichiometry

Q. Repeat the calculation for a truck that has a gas mileage of 6 mi/gal.

Solved • Oct 31, 2018

Stoichiometry

Q. A particular coal contains 2.5% sulfur by mass. When this coal is burned, the sulfur is converted into sulfur dioxide gas. The sulfur dioxide react...

Solved • Oct 31, 2018

Stoichiometry

Q. A particular coal contains 2.5% sulfur by mass. When this coal is burned, the sulfur is converted into sulfur dioxide gas. The sulfur dioxide react...

Solved • Oct 31, 2018

Stoichiometry

Q. An element X forms an iodide (XI3) and a chloride (XCl3). The iodide is quantitatively converted to the chloride when it is heated in a stream of c...

Solved • Oct 31, 2018

Stoichiometry

Q. A method used by the Environmental Protection Agency (EPA) for determining the concentration of ozone in air is to pass the air sample through a "b...

Solved • Oct 31, 2018

Stoichiometry

Q. A method used by the Environmental Protection Agency (EPA) for determining the concentration of ozone in air is to pass the air sample through a "b...

Solved • Oct 31, 2018

Stoichiometry

Q. You may want to reference (Pages 106 - 110) Section 3.7 while completing this problem.A chemical plant uses electrical energy to decompose aqueous ...

Solved • Oct 31, 2018

Stoichiometry

Q. You may want to reference (Pages 106 - 110) Section 3.7 while completing this problem.A chemical plant uses electrical energy to decompose aqueous ...

Solved • Oct 31, 2018

Stoichiometry

Q. The fat stored in the hump of a camel is a source of both energy and water.Calculate the mass of H2O produced by metabolism of 2.2 kg of fat, assum...

Solved • Oct 31, 2018

Stoichiometry

Q. A mixture of N2 (g) and H2 (g) reacts in a closed container to form ammonia, NH3 (g). The reaction ceases before either reactant has been totally c...

Solved • Oct 31, 2018

Stoichiometry

Q. A mixture containing KClO3, K2CO3, KHCO3, and KCl was heated, producing CO2,O2, and H2O gases according to the following equations:2 2KClO3 (s) →  ...

Solved • Oct 31, 2018

Stoichiometry

Q. A mixture containing KClO3, K2CO3, KHCO3, and KCl was heated, producing CO2,O2, and H2O gases according to the following equations:2 2KClO3 (s) →  ...

Solved • Oct 31, 2018

Stoichiometry

Q. An element X forms an iodide (XI3) and a chloride (XCl3). The iodide is quantitatively converted to the chloride when it is heated in a stream of c...

Solved • Oct 31, 2018

Stoichiometry

Q. You may want to reference (Pages 103 - 105)Section 3.6 while completing this problem.Detonation of nitroglycerin proceeds as follows: 4 C3H5N3O9(l)...

Solved • Oct 31, 2018

Stoichiometry

Q. You may want to reference (Pages 103 - 105)Section 3.6 while completing this problem.Detonation of nitroglycerin proceeds as follows: 4 C3H5N3O9(l)...

Solved • Oct 31, 2018

Stoichiometry

Q. You may want to reference (Pages 103 - 105)Section 3.6 while completing this problem.Detonation of nitroglycerin proceeds as follows: 4 C3H5N3O9(l)...

Solved • Oct 31, 2018

Stoichiometry

Q. You may want to reference (Pages 103 - 105) Section 3.6 while completing this problem.An iron ore sample contains Fe2O3 together with other substan...

Solved • Oct 31, 2018

Stoichiometry

Q. You may want to reference (Pages 103 - 105) Section 3.6 while completing this problem.An iron ore sample contains Fe2O3 together with other substan...

Solved • Oct 31, 2018

Stoichiometry

Q. You may want to reference (Pages 103 - 105) Section 3.6 while completing this problem.An iron ore sample contains Fe2O3 together with other substan...

Solved • Oct 31, 2018

Stoichiometry

Q. Calcium hydride reacts with water to form calcium hydroxide (aqueous) and hydrogen gas.How many grams of calcium hydride are needed to form 4.750 g...

Solved • Oct 31, 2018

Stoichiometry

Q. You may want to reference (Pages 102 - 105)Section 3.6 while completing this problem.The complete combustion of octane, C8H18, a component of gasol...

Solved • Oct 31, 2018

Stoichiometry

Q. You may want to reference (Pages 102 - 105)Section 3.6 while completing this problem.The complete combustion of octane, C8H18, a component of gasol...

Solved • Oct 31, 2018

Stoichiometry

Q. You may want to reference (Pages 102 - 105)Section 3.6 while completing this problem.The complete combustion of octane, C8H18, a component of gasol...

Solved • Oct 31, 2018

Stoichiometry

Q. The reaction between potassium superoxide, KO2, and CO2: 4 KO2 + 2 CO2 → 2 K2CO3 + 3 O2, is used as a source of O2 and absorber of CO2 in self-cont...

Solved • Oct 31, 2018

Stoichiometry

Q. The reaction between potassium superoxide, KO2, and CO2: 4 KO2 + 2 CO2 → 2 K2CO3 + 3 O2, is used as a source of O2 and absorber of CO2 in self-cont...

Solved • Oct 31, 2018

Stoichiometry

Q. The reaction between potassium superoxide, KO2, and CO2: 4 KO2 + 2 CO2 → 2 K2CO3 + 3 O2, is used as a source of O2 and absorber of CO2 in self-cont...

Solved • Oct 31, 2018

Stoichiometry

Q. When 1.57 mol O2 reacts with H2 to form H2O, how many moles of H2 are consumed in the process?

Solved • Oct 31, 2018

Stoichiometry

Q. Hydrofluoric acid, HF(aq), cannot be stored in glass bottles because compounds called silicates in the glass are attacked by the HF(aq). Sodium sil...

Solved • Oct 31, 2018

Stoichiometry

Q. Hydrofluoric acid, HF(aq), cannot be stored in glass bottles because compounds called silicates in the glass are attacked by the HF(aq). Sodium sil...

Solved • Oct 31, 2018

Stoichiometry

Q. Hydrofluoric acid, HF(aq), cannot be stored in glass bottles because compounds called silicates in the glass are attacked by the HF(aq). Sodium sil...

Solved • Oct 31, 2018

Stoichiometry

Q. Several brands of antacids use Al(OH)3 to react with stomach acid, which contains primarily HCl: Al(OH)3(s) + HCl(aq) → AlCl3(aq) + H2O(l)Calculate...

Solved • Oct 31, 2018

Stoichiometry

Q. Aluminum sulfide reacts with water to form aluminum hydroxide and hydrogen sulfide.How many grams of aluminum hydroxide are obtained from 16.2 g of...

Solved • Oct 31, 2018

Stoichiometry

Q. Automotive air bags inflate when sodium azide, NaN3, rapidly decomposes to its component elements: 2 NaN3(s) → 2 Na(s) + 3 N2(g)How many moles of N...

Solved • Oct 31, 2018

Stoichiometry

Q. Automotive air bags inflate when sodium azide, NaN3, rapidly decomposes to its component elements: 2 NaN3(s) → 2 Na(s) + 3 N2(g)How many grams of N...

Solved • Oct 31, 2018

Stoichiometry

Q. Automotive air bags inflate when sodium azide, NaN3, rapidly decomposes to its component elements: 2 NaN3(s) → 2 Na(s) + 3 N2(g)How many grams of N...

Solved • Oct 31, 2018

Stoichiometry

Q. Consider the generic chemical equation A + 3B → 2C. Let circles represent molecules of A, squares represent molecules of B, and triangles represent...

Solved • Oct 31, 2018

Stoichiometry

Q. Consider the generic chemical equation A + 3B → 2C. Let circles represent molecules of A, squares represent molecules of B, and triangles represent...

Solved • Oct 31, 2018

Stoichiometry

Q. You may want to reference (Pages 141 - 145) Section 4.2 while completing this problem.  Another component of acid rain is nitric acid, which forms ...

Solved • Oct 31, 2018

Stoichiometry

Q. You may want to reference (Pages 141 - 145) Section 4.2 while completing this problem.Another component of acid rain is nitric acid, which forms wh...

Solved • Oct 31, 2018

Stoichiometry

Q. Magnesium hydroxide, the active ingredient in milk of magnesia, neutralizes stomach acid, primarily HCl, according to the reaction: Mg(OH)2(aq) + 2...

Solved • Oct 31, 2018

Stoichiometry

Q. Calculate how many moles of NH3 form when each quantity of reactant completely reacts according to the equation:3N2H4 (l) → 4NH3(g) + N2(g)2.5 mol ...

Solved • Oct 31, 2018

Stoichiometry

Q. Calculate how many moles of NH3 form when each quantity of reactant completely reacts according to the equation:3N2H4 (l) → 4NH3(g) + N2(g)3.80 mol...

Solved • Oct 31, 2018

Stoichiometry

Q. Calculate how many moles of NH3 form when each quantity of reactant completely reacts according to the equation:3N2H4 (l) → 4NH3(g) + N2(g)63.8 g N2H4

Solved • Oct 31, 2018

Stoichiometry

Q. Calculate how many moles of NH3 form when each quantity of reactant completely reacts according to the equation:3N2H4 (l) → 4NH3(g) + N2(g)4.76 kg ...

Solved • Oct 31, 2018

Stoichiometry

Q. Sulfuric acid dissolves aluminum metal according to the following reaction:2Al(s) + 3H2SO4(aq) → Al2(SO4)3(aq) + 3H2(g)Suppose you wanted to dissol...

Solved • Oct 31, 2018

Stoichiometry

Q. Sulfuric acid dissolves aluminum metal according to the following reaction: 2 Al(s) + 3 H2SO4(aq) → Al2(SO4)3(aq) + 3 H2(g)Suppose you wanted to di...

Solved • Oct 31, 2018

Stoichiometry

Q. For each of the reactions, calculate the mass (in grams) of the product formed when 15.51 g of the underlined reactant completely reacts. Assume th...

Solved • Oct 31, 2018

Stoichiometry

Q. For each of the reactions, calculate the mass (in grams) of the product formed when 15.51 g of the underlined reactant completely reacts. Assume th...

Solved • Oct 31, 2018

Stoichiometry

Q. For each of the reactions, calculate the mass (in grams) of the product formed when 15.51 g of the underlined reactant completely reacts. Assume th...

Solved • Oct 31, 2018

Stoichiometry

Q. For each of the reactions, calculate the mass (in grams) of the product formed when 15.51 g of the underlined reactant completely reacts. Assume th...

Solved • Oct 31, 2018

Stoichiometry

Q. People sometimes use sodium bicarbonate as an antacid to neutralize excess hydrochloric acid in an upset stomach.What mass of hydrochloric acid (in...

Solved • Oct 31, 2018

Stoichiometry

Q. Consider the following balanced equation:2 N2H4(g) + N2O4(g) → 3 N2(g) + 4 H2O(g)Complete the following table showing the appropriate number of mol...

Solved • Oct 31, 2018

Stoichiometry

Q. Consider the following balanced equation:2 N2H4(g) + N2O4(g) → 3 N2(g) + 4 H2O(g)Complete the following table showing the appropriate number of mol...

Solved • Oct 31, 2018

Stoichiometry

Q. Consider the following balanced equation:2 N2H4(g) + N2O4(g) → 3 N2(g) + 4 H2O(g)Complete the following table showing the appropriate number of mol...

Solved • Oct 31, 2018

Stoichiometry

Q. Consider the following balanced equation:2 N2H4(g) + N2O4(g) → 3 N2(g) + 4 H2O(g)Complete the following table showing the appropriate number of mol...

Solved • Oct 31, 2018

Stoichiometry

Q. Consider the following balanced equation:2 N2H4(g) + N2O4(g) → 3 N2(g) + 4 H2O(g)Complete the following table showing the appropriate number of mol...

Solved • Oct 31, 2018

Stoichiometry

Q. Consider the following balanced equation:2 N2H4(g) + N2O4(g) → 3 N2(g) + 4 H2O(g)Complete the following table showing the appropriate number of mol...

Solved • Oct 31, 2018

Stoichiometry

Q. Under certain conditions sodium can react with oxygen to form sodium oxide according to the reaction: 4 Na(s) + O2(g) → 2 Na2O(s)A flask contains t...

Solved • Oct 31, 2018

Stoichiometry

Q. Consider the balanced equation:SiO2(s) + 3C(s) → SiC(s) + 2CO(g)Complete the following table showing the appropriate number of moles of reactants a...

Solved • Oct 31, 2018

Stoichiometry

Q. Consider the balanced equation:SiO2(s) + 3C(s) → SiC(s) + 2CO(g)Complete the following table showing the appropriate number of moles of reactants a...

Solved • Oct 31, 2018

Stoichiometry

Q. Consider the balanced equation:SiO2(s) + 3C(s) → SiC(s) + 2CO(g)Complete the following table showing the appropriate number of moles of reactants a...

Solved • Oct 31, 2018

Stoichiometry

Q. Consider the balanced equation:SiO2(s) + 3C(s) → SiC(s) + 2CO(g)Complete the following table showing the appropriate number of moles of reactants a...

Solved • Oct 31, 2018

Stoichiometry

Q. Consider the balanced equation:SiO2(s) + 3C(s) → SiC(s) + 2CO(g)Complete the following table showing the appropriate number of moles of reactants a...

Solved • Oct 31, 2018

Stoichiometry

Q. The world burns approximately 3.7 x 1012 kg of fossil fuel per year.Use the combustion of octane as the representative reaction and determine the m...

Solved • Oct 31, 2018

Stoichiometry

Q. Hydrolysis of the compound B5H9 forms boric acid, H3BO3. Fusion of boric acid with sodium oxide forms a borate salt, Na2B4O7.Without writing comple...

Solved • Oct 31, 2018

Stoichiometry

Q. Manganese(IV) oxide reacts with aluminum to form elemental manganese and aluminum oxide:3 MnO2 + 4Al → 3 Mn + 2 Al2O3What mass of Al is required to...

Solved • Oct 31, 2018

Stoichiometry

Q. An important reaction that takes place in a blast furnace during the production of iron is the formation of iron metal and CO2 from Fe2O3 and CO.Fi...

Solved • Oct 31, 2018

Stoichiometry

Q. An important reaction that takes place in a blast furnace during the production of iron is the formation of iron metal and CO2 from Fe2O3 and CO. D...

Solved • Oct 31, 2018

Stoichiometry

Q. A liquid fuel mixture contains 30.05 % hexane (C6H14), 16.05 % heptane (C7H16), and the rest octane (C8H18).What maximum mass of carbon dioxide is ...

Solved • Oct 31, 2018

Stoichiometry

Q. A mixture of C3H8 and C2H2 has a mass of 2.6 g. It is burned in excess O2 to form a mixture of water and carbon dioxide that contains 1.6 times as ...

Solved • Oct 31, 2018

Stoichiometry

Q. The reaction of NH3 and O2 forms NO and water. The NO can be used to convert P4 to P4O6, forming N2 in the process. The P4O6 can be treated with wa...

Solved • Oct 31, 2018

Stoichiometry

Q. Toilet bowl cleaners often contain hydrochloric acid to dissolve the calcium carbonate deposits that accumulate within a toilet bowl.What mass of c...

Solved • Oct 31, 2018

Stoichiometry

Q. The combustion of gasoline produces carbon dioxide and water. Assume gasoline to be pure octane (C8H18) and calculate the mass (in kg) of carbon di...

Solved • Oct 31, 2018

Stoichiometry

Q. Many home barbeques are fueled with propane gas (C3 H8 ).What mass of carbon dioxide (in kg) is produced upon the complete combustion of 18.9 L of ...

Solved • Oct 31, 2018

Stoichiometry

Q. Calculate how many moles of NO2 form when each quantity of reactant completely reacts.2N2O5(g) → 4NO2(g) + O2(g)3.01 kg N2O5

Solved • Oct 31, 2018

Stoichiometry

Q. Hydrobromic acid dissolves solid iron according to the following reaction:Fe(s) + 2HBr(aq) → FeBr2(aq) + H2(g)What mass of HBr (in g) would you nee...

Solved • Oct 31, 2018

Stoichiometry

Q. Hydrobromic acid dissolves solid iron according to the following reaction: Fe(s) + 2 HBr(aq) → FeBr2(aq) + H2(g)What mass of H2 would be produced b...

Solved • Oct 31, 2018

Stoichiometry

Q. For each of the reactions, calculate the mass (in grams) of the product formed when 3.51 g of the underlined reactant completely reacts. Assume tha...

Solved • Oct 31, 2018

Stoichiometry

Q. For each of the reactions, calculate the mass (in grams) of the product formed when 3.51 g of the underlined reactant completely reacts. Assume tha...

Solved • Oct 31, 2018

Stoichiometry

Q. For each of the reactions, calculate the mass (in grams) of the product formed when 3.51 g of the underlined reactant completely reacts. Assume tha...

Solved • Oct 31, 2018

Stoichiometry

Q. For each of the reactions, calculate the mass (in grams) of the product formed when 3.51 g of the underlined reactant completely reacts. Assume tha...

Solved • Oct 31, 2018

Stoichiometry

Q. For each of the following acid-base reactions, calculate the mass (in grams) of each acid necessary to completely react with and neutralize 4.70 g ...

Solved • Oct 31, 2018

Stoichiometry

Q. For each of the following acid-base reactions, calculate the mass (in grams) of each acid necessary to completely react with and neutralize 4.70 g ...

Solved • Oct 31, 2018

Stoichiometry

Q. For each of the following acid-base reactions, calculate the mass (in grams) of each acid necessary to completely react with and neutralize 4.70 g ...

Solved • Oct 31, 2018

Stoichiometry

Q. For each of the following precipitation reactions, calculate how many grams of the first reactant are necessary to completely react with 55.3 g of ...

Solved • Oct 31, 2018

Stoichiometry

Q. For each of the following precipitation reactions, calculate how many grams of the first reactant are necessary to completely react with 55.3 g of ...

Solved • Oct 31, 2018

Stoichiometry

Q. For each of the following precipitation reactions, calculate how many grams of the first reactant are necessary to completely react with 55.3 g of ...

Solved • Oct 31, 2018

Stoichiometry

Q. Consider the unbalanced equation for the combustion of hexane:C6H14(g) + O2(g) → CO2(g) + H2O(g)Determine how many moles of O2 are required to reac...

Solved • Oct 31, 2018

Stoichiometry

Q. Consider the unbalanced equation for the neutralization of acetic acid:HC2H3O2(aq) + Ba(OH)2(aq) → H2O(l) + Ba(C2H3O2)2(aq)Determine how many moles...

Solved • Oct 31, 2018

Stoichiometry

Q. Calculate how many moles of NO2 form when each quantity of reactant completely reacts.2N2O5(g) → 4NO2(g) + O2(g)2.6 mol N2O5

Solved • Oct 31, 2018

Stoichiometry

Q. Calculate how many moles of NO2 form when each quantity of reactant completely reacts.2N2O5(g) → 4NO2(g) + O2(g)7.0 mol N2O5

Solved • Oct 31, 2018

Stoichiometry

Q. Calculate how many moles of NO2 form when each quantity of reactant completely reacts.2N2O5(g) → 4NO2(g) + O2(g)16.2 g N2O5

Solved • Oct 31, 2018

Stoichiometry

Q. What is reaction stoichiometry?

Solved • Oct 31, 2018

Stoichiometry

Q. A mixture of carbon and sulfur has a mass of 9.0 g. Complete combustion with excess O2 gives 24.6 g of a mixture of CO2 and SO2.Find the mass of su...

Solved • Oct 31, 2018

Stoichiometry

Q. When copper(II) sulfate pentahydrate (CuSO4•5H2O) is heated, it decomposes to the dehydrated form. The waters of hydration are released from the so...

Solved • Oct 24, 2018

Stoichiometry

Q. Calculate the mass (in g) of O2 consumed in the complete combustion of 41.6 g sample of C4H8O. (Hint, write the balanced equation.)

Solved • Oct 24, 2018

Stoichiometry

Q. Green plants use light from the Sun to drive photosynthesis. Photosynthesis is a chemical reaction in which water (H2O) and carbon dioxide (CO2) ch...

Solved • Oct 23, 2018

Stoichiometry

Q. How many moles of NaOH will react with 1 mole of H2SO4 in the below unbalanced reaction? NaOH + H2SO4 → H2O + Na2SO4 

Solved • Oct 23, 2018

Stoichiometry

Q. What mass of oxygen is needed to react with 3.69 gal of methanol according to the balanced equation below? (1.00 gal = 3.79 L, and the density of m...

Solved • Oct 23, 2018