Step-by-step explanation:
The theoretical yield of our reaction is 1.50 moles, the actual yield of aluminum oxide is 0.885 moles. The percent yield is:
percent yield = actual yield/theoretical yield * 100 %
percent yield = 0.885 moles/(1.50 moles) * 100 %
percent yield = 59.0 %
Answer: The percent yield is 59.0 %.