I need help, please! I am totally and completely lost with this problem. Unfortunately, my book does not give any examples for me to go by. Here is the problem... In the following reaction, 24 g of CH4 (methane) react completely with 96 g of O2 to form 66 g of CO2. How many grams of H20 are formed? CH4 + CO2---->CO2 + 2H2O Where do I begin on this problem? TIA for any help provided.