The chemical equation for the reaction of methane (CH4) with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O) is:
CH4 + 2O2 → CO2 + 2H2O
This equation shows that one molecule of methane reacts with two molecules of oxygen to produce one molecule of carbon dioxide and two molecules of water. The equation is balanced, meaning that the same number of atoms of each element appears on both sides of the equation.