A student combines aluminum with oxygen, which
react according to the equation shown below. How
many grams of oxygen will react completely with
40.5 grams of aluminum? The atomic masses of
aluminum and oxygen are 27.0 grams and 16.0
grams, respectively.
4Al(s) 302(g) → 2Al2O3(s)

A. 18.0 grams
B. 54.6 grams
C. 27.0 grams
D. 36.0 grams