Chemistry 11 Stoichiometry Review Worksheet Name:_________________

33. If 5.95g of potassium chlorate are decomposed to form potassium chloride, then 1.45g of oxygen gas is also given off. Calculate the percentage yield of oxygen. 34. The roasting of iron (II) carbonate produces iron (III) oxide:

FeCO3 + O2 à Fe2O3 + CO2

What mass of iron (II) carbonate with a purity of 62.8% is needed to make 1.00 kg of iron (III) oxide? 35. 50g of iron metal is reacted with 150g of copper (II) sulfate. 43g of copper metal is recovered. What is the limiting reactant in this reaction? Determine the theoretical yield of copper and the percentage yield for copper produced. 36.The combustion of 40g of ethane gas (C2H6) produces 60g of water. What is the percentage yield of the reaction? 37. 50.0g of magnesium nitride is mixed with 30.0g of water. The reaction produces a certain volume

of ammonia gas and 40.0g of magnesium hydroxide. What is the percentage yield of magnesium hydroxide?

38. When 21.8g of silver nitrate are reacted with an excess amount of sodium chloride, 17.6g of silver chloride is produced. Calculate the percentage yield for silver chloride.

39. When 5.44g of copper are reacted with an excess of oxygen, 5.10g of copper (II) oxide are formed. Calculate the percentage yield of copper (II) oxide.