Worksheet – Stoichiometry I

1. For the complete combustion of butane (C4H10), answer the following questions.

a. What is the balanced chemical equation for the reaction?

b. What are the mole equivalencies between reactants and products?

c. How many moles of oxygen will be needed to completely react with 1.45 moles of butane?

d. How many moles carbon dioxide will be produced?

e. How many moles of water will be produced?

2. In the reaction P4 + 5O2 2P2O5. How many moles of oxygen gas are consumed each time 0.500 mol

of P2O5 is formed?

3. How many moles of oxygen are produced from 3.0 moles of potassium chlorate in this equation? How

many moles of potassium chloride will be produced in the same reaction?

2 KC1O3 (s) 2 KC1 (s) + 3O2 (g)