Consider the equations below. H_{2} -> 2H; C_{2}*H_{4} + H -> C_{2}*H_{5}; C_{2}*H_{5} + H -> C_{2}*H_{6} When these equations are added together, what will the overall equation be? Assume that no equations need to be reversed. C_{2}*H_{4} + H_{2} -> C_{2}*H_{6}; H 2 +C 2 H 4 +2H+C 2 H 5 + 2H+C 2 H 5 +C 2 H 6; C_{2}*H_{4} + C_{2}*H_{5} + H_{2} -> C_{2}*H_{5} + C_{2}*H_{6}