Consider the following intermediate chemical equations. 2 Equations. 1: 2 Upper H subscript 2 (g) plus upper O subscript 2 (g) right arrow 2 upper H subscript 2 upper O (l). 2: upper H subscript 2 (g) plus F subscript 2 (g) right arrow 2 upper H upper F (g). In the final chemical equation, HF and Omc029-2. Jpg are the products that are formed through the reaction between mc029-3. Jpg and Fmc029-4. Jpg. Before you can add these intermediate chemical equations, you need to alter them by multiplying the second equation by 2 and reversing the first equation. First equation by 2 and reversing it. First equation by (1/2) and reversing the second equation. Second equation by 2 and reversing it.