If you end up with 8.53 grams of H2O, how many grams of O2 did you consume in this reaction?

Question

Reaction:

__ B2H6 + _3_ O2 → _2_ HBO2 + _2_ H2O

Answer 1

(32.0 g O₂)/(1 mol O₂) (3 mol O₂/2 mol H₂O) (1 mol H₂O/18.0 g H₂O) (8.53 g H₂O) = 22.75 = 22.8 g O₂