If 3.4 mol C2H4O are used, determine the number of moles of O2 that would be used

Answer 1

Assuming you are referring to the complete combustion of C₂H₄O, we would have the following reaction:

2C₂H₄O + 5O₂ ==> 4CO₂ + 4H₂O ... balanced equation

3.4 mol C₂H₄O x 5 mol O₂ / 2 mol C₂H₄O = 8.5 mols O₂ used