Stoichiometry deals with the calculation of the mass and volume of reactants and products in chemical reactions. The term stoichiometry was first introduced by the German chemist Jeremias Benjamin Richter (1762-1807) in the late 19th century. It relates to the relative amounts of reactants and products in a chemical reaction. His calculations are based on the fact that atoms cannot be created or destroyed. The number and types of atoms before and after the reaction are always the same.
