Question: how many moles of carbon dioxide would be produced from 6.25 moles of oxygen gas?
Answer: When you burn 6.25 moles of methane, you need 12.5 moles of oxygen gas. When you burn 6.25 moles of methane, you produce 6.25 moles of carbondioxide (275 grams of CO2 ) and 12.5 moles of water vapour (225 grams of H2O ).