Balanced equations

Question

For the balanced equation shown below, how many grams of CO would be produced by 72.0 grams of O2? C3H6+3O2 → 3CO+3H2O

Answer 1

Convert grams of O2 --> moles of O2 using MW of O2 (32 g/mol)

Convert moles of O2 --> moles of CO using the balanced chemical equations (3 CO per 3 O2)

Convert moles of CO --> grams of CO using the MW of CO (28 g/mol)

So...

72g O2 x 1 mol O2/32g O2 x 3 mol CO/ 3 mol O2 x 28 g CO/ 1 mol CO = 63 g CO