If 16.0 grams of aluminum oxide were actually produced, what is the percent yield of the reaction below given that you start with 10.0 g of Al and 19.0 grams of O2?
Reaction: 4Al + 3O2 ? 2Al2O3
A) 75.0%
B) 100%
C) 84.7%
D) 39.6%
E) not enough information
Answer: C