Aluminum and oxygen react to form aluminum oxide.

4 Al + 3 O2 2 Al2O3

a. What is the limiting reactant if 30.7 g Al are reacted with 38.3 g of O2?

b. What is the theoretical yield of Al2O3, in grams?

c. If 35.3 g of Al2O3 are obtained, what is the percent yield?