According to the law of conservation mass (also known as the law of mass conservation), mass can neither be created nor destroyed in a chemical reaction. This means that the total mass of the reactants in a chemical reaction must be equal to the total mass of the products. Balanced chemical equations ensure that the law of conservation of mass is obeyed by including coefficients in front of the reactants and products to adjust the stoichiometry and account for the relative amounts of substances involved in the reaction. By balancing chemical equations, we can ensure that the number of atoms of each element is the same on both sides of the equation, thereby satisfying the law of conservation of mass