The balanced equation given below means: ch4 + 2 o2 → co2 + 2h2o the balanced equation given below means: ch4 + 2 o2 → co2 + 2h2o one molecule of methane reacts with two molecules of oxygen to produce one molecule of carbon dioxide and two molecules of water. one gram of methane reacts with two grams of oxygen to produce one gram of carbon dioxide and two grams of water. one mole of methane reacts with two moles of oxygen to produce one mole of carbon dioxide and 2 moles of water. one mole of methane reacts with two moles of oxygen to produce one mole of carbon dioxide and 2 moles of water, one gram of methane reacts with two grams of oxygen to produce one gram of carbon dioxide and two grams of water and one molecule of methane reacts with two molecules of oxygen to produce one molecule of carbon dioxide and two molecules of water. one mole of methane reacts with two moles of oxygen to produce one mole of carbon dioxide and 2 moles of water and one molecule of methane reacts with two molecules of oxygen to produce one molecule of carbon dioxide and two molecules of water.