Question

How many CO2 molecules would be formed from the reaction mixture that produces the greatest amount of products?

2CH3OH(g)+3O2(g)--->2CO2(g)+4H2O(g)

Answer 1

Your question begs. Combustion, as above, produces the largest amount of carbon dioxide. If only two molecules of methanol were available, then two molecules of carbon dioxide would be produced. However, it is very difficulty to react only two molecules.