posted by Annabella .
132 grams of CH4 reacts with Oxygen gas to produce carbon dioxide and water vapor.
give the mass of the oxygen needed to react with all the methane and give the mass of the carbon dioxide and water vapor produced.
can somebody explain this to me? i'm lost. . .
You need to write the equation and balanc it. I assume you have it but didn't post it. Here is a step by step procedure for working stoichiometry problems.