Answer :
For each C3H8, you get 3 C's in CO2, so 13.2 x 3 = 39.6
For each O2, you use 5 to make 3 O2s, so (80/5)3 = 48
39.6+48= 87.6 grams
For each O2, you use 5 to make 3 O2s, so (80/5)3 = 48
39.6+48= 87.6 grams