Which of the following is required when balancing a chemical equation so that it obeys the law of conservation? A.
changing the formulas of the products and reactants

B.
making sure the reactants and products are in the same phase

C.
keeping the total charge the same on both sides of the equation

D.
having the same number of atoms on both sides of the equation

You exhale co2 which is produced during cellular respiration.  co2 combines with the water in your blood's plasma to make up one half of the body's most important buffer pair, carbonic acid.  the more physical activity you engage in, the more co2 your body is producing.  you can see this by putting some of the cabbage indicator in a glass and then blowing bubbles into it through a straw.  can you see a change in the color of the indicator?