Which of the following is not evidence for the law of conservation of mass during cellular respiration? The total number of atoms when glucose and oxygen react stays the same when carbon dioxide and water are produced. C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + energy The products from cellular respiration are created from the same elements (carbon, oxygen, and hydrogen) that make up the reactants. Cellular respiration creates an energy molecule when glucose is broken down.