Q. Illustrate Law of Conservation of Mass?

Ans:

Conservation of Mass and Atoms:

The Law of Conservation of Mass states that mass is neither created nor destroyed. Therefore, the total mass of matter before and after a chemical change remains the same. The number of atoms also remains the same. The only thing that changes is the arrangement of the atoms.

For example, the sum of the masses of hydrogen and oxygen before they combine to form water is the same as the total mass of the water they form. Furthermore, the sum of the number of atoms of hydrogen and oxygen is the same as the total number of atoms in the water.

The only change that occurs in a chemical reaction is in the arrangement of the atoms. Prior to the reaction, the hydrogen and oxygen atoms are not bonded to one another, and therefore exist separately. However, after the reaction, the hydrogen and oxygen atoms are bonded to one another.