Answers

1. For the reaction

2S(s) + 3O₂(g) ---> 2SO₃(g)

if 6.3 g of S is reacted with 10.0 g of O₂, show by calculation which one will be the limiting

reactant.

Answer: S is the limiting reactant.

2. For the reaction

CaCO₃(s) + 2HCl(aq) ----> CaCl₂(aq) + CO₂(g) + H₂O(l)

68.1 g solid CaCO₃ is mixed with 51.6 g HCl. What number of grams of CO₂ will be produced?

Answer: 15.0 g CO₂

3. You react 25.0 g of hydrogen gas with 25.0 g of oxygen gas. Determine the mass of water that

can be produced from these reactants.

Answer: 28.2 g H₂O