N2 + 3H2 → 2NH3
Use this equation to calculate the number of moles of ammonia produced when:
a) 10 moles of nitrogen react with excess gaseous hydrogen.
b) 30 moles of hydrogen react with excess nitrogen.
c) 20 moles of hydrogen react with 40 moles of nitrogen.
Hint: One of the reactants will be in excess, that is, it will not be consumed completely.
2. When iron reacts with oxygen at high temperatures, a magnetic iron oxide is produced:
3Fe + 2O2 → Fe3O4
a. How many moles of iron and oxygen are required to produce 10 moles of magnetic iron oxide? (4 marks)
b. How many moles of oxygen are required to react with 30 moles of iron? (2 marks)
c. If a reaction is brought about between 60 moles of iron and 60 moles of oxygen,
i) which reactant will be in excess and by how many moles?
ii) calculate the number of moles of magnetic iron oxide produced.
Hint: To find which reactant is in excess, calculate how many moles of one reactant are required to react with the other reactant.
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