FREE CART Stoichiometry Questions and Answers

Question 1

In the balanced chemical equation 2H₂ + O₂ → 2H₂O, how many moles of water are produced when 3 moles of hydrogen gas react completely?

Accepted Answer

3 moles

Answer

1.5 moles

Answer

2 moles

Answer

6 moles

Question 2

Given the reaction: N₂ + 3H₂ → 2NH₃, how many moles of hydrogen gas are needed to produce 4 moles of ammonia?

Accepted Answer

6 moles

Answer

4 moles

Answer

3 moles

Answer

12 moles

Question 3

In the reaction: 4Fe + 3O₂ → 2Fe₂O₃, what is the mole ratio of iron (Fe) to ferric oxide (Fe₂O₃)?

Accepted Answer

4:2

Answer

1:1

Answer

2:3

Answer

4:3

Question 4

How many grams of CO₂ are produced when 44 grams of propane (C₃H₈) undergo complete combustion according to the equation: C₃H₈ + 5O₂ → 3CO₂ + 4H₂O? (Molar masses: C₃H₈ = 44 g/mol, CO₂ = 44 g/mol)

Accepted Answer

132 grams

Answer

44 grams

Answer

88 grams

Answer

176 grams

Question 5

If 8 moles of Al react with 3 moles of Fe₂O₃ according to the equation: 2Al + Fe₂O₃ → 2Fe + Al₂O₃, what is the limiting reactant?

Accepted Answer

Fe₂O₃

Answer

Al

Answer

Fe

Answer

Al₂O₃