Stoichiometry deals with the calculation of the quantities of products and reactants involved in chemical reactions. It involves determining the proportions in which substances react or are produced using the relationships between the amounts of substances in a balanced chemical equation.

Importance of Stoichiometry: Stoichiometry helps in Understanding Chemical Reactions, Predicting Product Amounts, Ensuring Reaction Efficiency, limiting reactants and Excess reactants, and identifying environmental Impacts.