How does a balanced chemical equation demonstrate the Law of Conservation of Mass?

Question

it shows that the properties of the elements stay the same after the reaction

it shows that no atoms have been gained or lost during the reaction

it shows that only physical changes follow the Law of Conservation of Mass

it shows that all compounds remain bonded after the reaction

Answer 1

A balanced chemical equation demonstrates the Law of Conservation of Mass primarily because:

It shows that no atoms have been gained or lost during the reaction.

In a balanced chemical equation, the number of atoms of each element on the reactant side (left) is equal to the number of atoms of each element on the product side (right). This reflects the principle that mass is conserved in a chemical reaction, meaning that the total mass of the reactants equals the total mass of the products, with no atoms disappearing or appearing out of nowhere.