Honors Chem, chapter 9

For the reaction represented by the Pb(NO3)2 + 2KI -> PbI2 + 2KNO3, how many moles of lead(II) iodine are produced from 300 g of potassium iodine and an excess of Pb(NO3)2?

0.904 mol

Which coefficient correctly balance the formula NH4NO2 -> N2 + H2O

1, 1, 2

For the reaction represented by the equation Cl2 + 2KBr -> 2KCl + Br2, how many moles of potassium chloride are produced from 119 g of potassium bromide?

1.00 mol

For the reaction represented by the equation 2H2 + O2 -> 2H2O, how many grams of water are produced from 6 mol of hydrogen?

108 g

How many moles of Ag can be produced if 350 g of Cu are reacted with excess AgNO3 according to the equation Cu + 2AgNO3 -> 2Ag + Cu(NO3)2?

11 mol

For the reaction represented by the equation 2Na + 2H2O -> 2NaOH + H2, how many grams of sodium hydroxide are produced from 3 mol of sodium with and excess of water?

120 g

For the reaction represented by the equation Cl2 + 2KBr -> 2KCl + Br2, how many grams of potassium chloride can be produced from 300 g of each of chlorine and potassium bromide?

188 g

In the reaction represented by the equation N2 + 3H2 -> 2NH3, what is the mole ratio of nitrogen to ammonia?

1:2

Ozone, O3, is produced by the reaction represented by the following equation: NO2(g)+O2(g)-->NO(g)+O3(g) What mass of ozone will form from the reaction 2.0 g of NO2 in a car's exhaust and excess oxygen?

2.1 g O3

For the reaction represented by the equation C + 2H2 -> CH4, how many moles of hydrogen are required to produce 10 mol of methane, CH4?

20 mol

The Haber process for producing ammonia commercially is represented by the equation N2 + 3H2 -> 2NH3. To completely convert 9 mol hydrogen gas to ammonia gas, how many moles of nitrogen gas are required?

3 mol

For the reaction represented by the equation SO3 + H2O -> H2SO4, how many grams of sulfur trioxide are required to produce 4 mol of sulfuric acid in an excess of water?

320 g

What mass in grams of sodium hydroxide is produced if 20 g of sodium metal react with excess water according to the chemical equation 2Na + 2H2O -> 2NaOH + H2?

34.8 g

What mass of PCl3 forms in the reaction of 75 g P4 with 275 g Cl2?

356.2 g

The reaction of 100 g of salicylic acid, C7H6O3, with excess acetic anhydride produces 50 g of aspirin, C9H8O4, according to the equation below. What is the percentage yield for this reaction?

38.3%

How many grams of ammonium sulfate can be produced if 30 mol of H2SO4 react with excess NH3 according to the equation 2NH3 + H2SO4 -> (NH4)2SO4?

3900 grams

In the equation 2KClO3 -> 2KCl + 3O2, how many moles of oxygen are produced when 3 mol of KClO3 decompose completely?

4..5 mol

For the reaction represented by the equation 2Na + 2H2O -> 2NaOH + H2, how many grams of hydrogen are produced if 120 g of sodium and 80 g of water are available?

4.5 g

What mass in grams of hydrogen gas is produced if 20 mol of Zn are added to excess hydrochloric acid according to the equation Zn + 2HCl -> ZnCl2 + H2?

40 grams

In the decomposition of hydrogen peroxide, the percentage yield of oxygen is 93%. What is the actual yield in grams of oxygen if you start with 100 g of H2O2? The reaction proceeds according to the equation 2H2O2 -> 2H2O + O2

43.7 g

In the reaction represented by the equation 2NH3 + CO2 -> CO(NH2)2 + H2O, 30.7 g of CO(NH2)2 forms per 1 mol of CO2 that reacts when NH3 is in excess. What is the percentage yield?

51.16%

For the reaction represented by the equation CH4 + 2O2 -> CO2 + 2H2O, how many moles of carbon dioxide are produced from the combustion of 100 g of methane?

6.23 mol

What mass in grams of potassium chloride is produced if 100 g of potassium chlorate decompose according to the following equation? 2KClO2 -> 2KCl + 3O2

61.5 g

What mass in grams of 1-chloropropane (C3H7Cl) is produced if 400 g of propane react with excess chlorine gas according to the equation C3H8 + Cl2 -> C3H7Cl + HCl?

710 g

For the reaction represented by the equation CH4 + 2O2 -> 2H2O + CO2, calculate the percentage yield of carbon dioxide if 1000 g of methane react with excess oxygen to produce 2300 g of carbon dioxide.

83.88%

When the formula equation Fe3O4 + Al ---> Al2O3 + Fe is correctly balanced the coefficient of Fe is number

9

For the reaction represented by the equation Cl2 + 2KBr -> 2KCl + Br2, calculate the percentage yield if 200 g of chlorine react with excess potassium bromide to produce 410 g of bromine.

91.0%

For the reaction represented by the equation SO3 + H2SO4, calculate the percentage yield if 500 g of sulfur trioxide react with excess water to produce 575 g of sulfuric acid.

91.2%

What is the measured amount of a product obtained from a chemical reaction?

actual yield

To determine the limiting reactant in a chemical reaction, one must know the

available amount of each reactant

To balance a chemical equation, it may be necessary to adjust the

coefficients

What is the study of the mass relationships of elements in compounds?

composition stoichiometry

In most chemical reactions the amount of product obtained is

less than the theoretical yield

Which reactant controls the amount of product formed in a chemical reaction?

limiting reactant

Each of the four types of reaction stoichiometry problems requires using a

mole ratio

A balanced chemical equation allows one to determine the

mole ratio of any two substances in the reaction

A chemist interested in the efficiency of a chemical reaction would calculate the

percentage yield

What is the study of the mass relationships among reactants and products in a chemical reaction?

reaction stoichiometry

When the limiting reactant in a chemical reaction is completely used, the

reaction stops

The coefficients in a chemical equation represents the

relative numbers of miles of reactants and products

A chemical equation is balanced when the

same number of each kind of atom appears in the reactants and in the products

Which branch of chemistry deals with the mass relationships of elements in compounds and the mass relationships among reactants and products in chemical reactions?

stoichiometry

Which of the following would not be studied in the branch of chemistry called stoichiometry?

the amount of energy required to break the ionic bonds in calcium fluoride

To determine the limiting reactant in a chemical reaction involving known masses of A and B, one could first calculate

the number of moles of B and the number of moles of A available

What is the maximum possible amount of product obtained in a chemical reaction?

theoretical yield