Which substances are needed for cellular respiration? Use complete sentences to explain how the mass of hydrogen is conserved during cellular respiration.

Glucose and oxygen are required for cellular respiration. As the law of conversation states, in a biochemical reaction, mass is conserved. For every glucose molecule, 6 oxygen molecules are used up and the end products, other than the energy dissipated by the reaction, are 6 water molecules and 6 carbon dioxide molecules. The mass of hydrogen in the glucose is therefore conserved in the water molecules products.