How does a balance chemical equation demonstrate the law of conversation of Mass
A balanced chemical equation demonstrates the law of conservation of mass because it shows that the mass of the reactants must equal the mass of the products. According to the law of conservation of mass, mass can neither be created nor destroyed in a chemical reaction, it can only be transformed from one form to another.
In a balanced chemical equation, the number of atoms of each element is the same on both sides of the equation. This means that the total mass of the reactants is equal to the total mass of the products. It shows that the mass is conserved throughout the reaction, as the same atoms are rearranged to form new substances.
For example, consider the balanced chemical equation for the reaction of hydrogen gas (H2) with oxygen gas (O2) to form water (H2O):
2H2 + O2 -> 2H2O
In this equation, there are four hydrogen atoms and two oxygen atoms on both sides. This means that the total mass of the reactants (two molecules of hydrogen gas and one molecule of oxygen gas) is equal to the total mass of the products (two molecules of water). The law of conservation of mass is thus demonstrated by the balanced chemical equation.