SCH3U Quantities in Chemical Reactions

Question

How many moles of H₂O are produced when 6 mol of O₂ is consumed in burning methyl alcohol, CH₃OH, according to the following equation?

2CH₃OH + 3O₂ = 2CO₂ + 4H₂O

Answer 1

2CH₃OH + 3O₂ = 2CO₂ + 4H₂O ... balanced equation

Using the mol ratios of O2 and H2O in the balanced equation we can find mols of H2O ...

6 mols O₂ x 4 mols H₂O / 3 mols O₂ = 8 mols H₂O