Suppose this reaction is allowed to go to completion. Now, what happens if two moles of methane of this guy react with six moles of water? So what happens? Well, let's see. Let's first notice that the ratio of the number of moles of methane, the number of moles of oxygen is one to two. So that means whenever 1 mol reacts with two moles of this guy, they produce carbon dioxide, 1 mol and two moles of water.