Question

the quantities relationship between the substances according to balance equation describes​

Answer 1

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Chemical reactions are balanced by adding coefficients so that the number of atoms of each element is the same on both sides. Stoichiometry describes the relationship between the amounts of reactants and products in a reaction.

Answer 2

Explanation:

A balanced chemical equation gives the identity of the reactants and the products as well as the accurate number of molecules or moles of each that are consumed or produced. ... A stoichiometric quantity is the amount of product or reactant specified by the coefficients in a balanced chemical equation.

The Law of conservation of mass states that matter can be changed from one form into another, mixtures can be separated or made, and pure substances can be decomposed, but the total amount of mass remains constant. We can state this important law in another way. The total mass of the universe is constant within measurable limits; whenever matter undergoes a change, the total mass of the products of the change is, within measurable limits, the same as the total mass of the reactants. According to law of conservation of mass, the mass of products in a reaction must be equal to mass of reactants so the balancing of equations is done to obey this law.

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