Consider the following intermediate chemical equations. 2 equations: first: upper C (s) plus one-half upper O subscript 2 (g) right arrow upper C upper O (g). Second: upper C upper O (g) plus one-half upper O subscript 2 (g) right arrow upper C upper O subscript 2 (g). When you form the final chemical equation, what should you do with CO? Cancel out CO because it appears as a reactant in one intermediate reaction and a product in the other intermediate reaction. Add the two CO molecules together, and write them as reactants in the final chemical reaction. Write CO only once as a reactant in the final chemical reaction. Write CO as a reactant and a product in the final chemical reaction.