the acceleration due to gravity at the surface of the moon is 1.6m/s. if the radius of the moon is 1.7*10^6n, calculate the mass of the moon.

The masses of the objects and their densities

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.