Exam Bank for Stoichiometry- Questions and Answers Latest Update 2025 (Already Passed)
If 1 egg and 1/3 cup of oil are needed for each bag of brownie mix, how many bags of brownie mix do
you need if you want to use up all 3 eggs and 1 cup of oil? - Answers 3
What is conserved in the reaction shown below? H2(g)+Cl2(g)-> 2HCl(2) - Answers mass, moles,
molecules, and volume
In a chemical reaction, the mass of the products - Answers is equal to the mass of the reactants
In any chemical reaction, the quantities that are preserved are - Answers mass and the number of ions
The first step in the most stoichiometry problems is to - Answers convert given quantities to the moles
In the reation 2CO(g)+O2 (g)-> 2CO2(g) what is the ratio of moles of oxygen used to moles of CO2 -
Answers 1:2
Which of the following is true about the total number of reactants and the total number of products in
the reaction shown below.
C5H12(l) + 8O2(g)-> 5CO2(g)+6H2O(g) - Answers 9 moles of reactants chemically changed to 11 moles of
the product
which of the following is an INCORRECT interpretation of the balanced equation shown below?
2S(s)+3O2(g)-> 2SO3(g) - Answers 2g S+ 3g O2 -> 2g SO3
How many moles of aluminum are needed to react completely with 1.2 mol of FeO?
2Al(s) + 3FeO(s) -> 3Fe (s) + Al2O3 (s) - Answers 0.8 mol
How many moles of glucose C6H12O6 can be burned biologically when 10.0 mol of oxygen is avaliable?
C6H12O6 (s) + 6O2 -> 6O2 (g) +Al2O3 (s) - Answers 1.67 mol
Hydrogen gas can be produced by reacting aluminum with Sulfuric acid. How many moles of sulfuric acid
are needed to completely react with 15.0 mol of aluminum?
2Al (s) + 3H2SO4 (aq)->Al2 (SO4)3 (aq) + 3H2 (g) - Answers 22.5 mol
when iron rust in air, iron(111) oxide is produced. How many moles of oxygen react with 2.4 mol of iron
in the rusting reaction?
4Fe (s) + 3O2 (g) -> 2Fe2O3 (s) - Answers 1.8 mol
At STP, how many liters of oxygen are required to react completely with 3.6 liters of hydrogen to form
water?
2H2 (g) +O2 (g) -> 2H3PO4 (aq) - Answers 1.8 L
If 1 egg and 1/3 cup of oil are needed for each bag of brownie mix, how many bags of brownie mix do
you need if you want to use up all 3 eggs and 1 cup of oil? - Answers 3
What is conserved in the reaction shown below? H2(g)+Cl2(g)-> 2HCl(2) - Answers mass, moles,
molecules, and volume
In a chemical reaction, the mass of the products - Answers is equal to the mass of the reactants
In any chemical reaction, the quantities that are preserved are - Answers mass and the number of ions
The first step in the most stoichiometry problems is to - Answers convert given quantities to the moles
In the reation 2CO(g)+O2 (g)-> 2CO2(g) what is the ratio of moles of oxygen used to moles of CO2 -
Answers 1:2
Which of the following is true about the total number of reactants and the total number of products in
the reaction shown below.
C5H12(l) + 8O2(g)-> 5CO2(g)+6H2O(g) - Answers 9 moles of reactants chemically changed to 11 moles of
the product
which of the following is an INCORRECT interpretation of the balanced equation shown below?
2S(s)+3O2(g)-> 2SO3(g) - Answers 2g S+ 3g O2 -> 2g SO3
How many moles of aluminum are needed to react completely with 1.2 mol of FeO?
2Al(s) + 3FeO(s) -> 3Fe (s) + Al2O3 (s) - Answers 0.8 mol
How many moles of glucose C6H12O6 can be burned biologically when 10.0 mol of oxygen is avaliable?
C6H12O6 (s) + 6O2 -> 6O2 (g) +Al2O3 (s) - Answers 1.67 mol
Hydrogen gas can be produced by reacting aluminum with Sulfuric acid. How many moles of sulfuric acid
are needed to completely react with 15.0 mol of aluminum?
2Al (s) + 3H2SO4 (aq)->Al2 (SO4)3 (aq) + 3H2 (g) - Answers 22.5 mol
when iron rust in air, iron(111) oxide is produced. How many moles of oxygen react with 2.4 mol of iron
in the rusting reaction?
4Fe (s) + 3O2 (g) -> 2Fe2O3 (s) - Answers 1.8 mol
At STP, how many liters of oxygen are required to react completely with 3.6 liters of hydrogen to form
water?
2H2 (g) +O2 (g) -> 2H3PO4 (aq) - Answers 1.8 L
