Question

the chemical equations must be balanced according to​

Answer 1

Answer:

According to the law of conservation of mass, when a chemical reaction occurs, the mass of the products should be equal to the mass of the reactants. ... A balanced chemical equation occurs when the number of the atoms involved in the reactants side is equal to the number of atoms in the products side.

Answer 2

According to the law of conservation of mass, when a chemical reaction occurs, the mass of the products should be equal to the mass of the reactants

Chemical equations must be balanced to satisfy the law of conservation of matter, that states that matter cannot be produced or destroyed in a closed system. The law of conservation of mass governs the balancing of a chemical equation. ... If the chemical equation is not balanced the law of conservation is not applicable.