During combustion, methane yields carbon dioxide and water. the unbalanced equation for this reaction is: ch4(g) + o2(g) co2(g) + h2o(l) what will the mole ratios for the balanced equation be? (what coefficients are needed in order to balance this equation? ) a. 1 : 1 : 2 : 1 b. 5 : 4 : 3 : 6 c. 1 : 2 : 1 : 2 d. 1 : 1 : 1 : 2