Why does mixing reactants in different mole ratios affect the amount of the product and the amount of each reactant that is left over?

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later

1) according to the law of conservation of mass ,in all chemical reactions total mass is unchanged

Answer ozone (o3) is made of three atoms of oxygen, it is a molecule;

The water cycle increase the water content in the earth atmosphere