Question

Assertion:- the number of atoms of each element remains the same , before and after a chemical reaction .
Reason :- any chemical equation can be unbalanced because the mass may not be same on both sides of the equation. ​

Answer 1

Answer:

Yep I know the answer for this question

Explanation:

A reaction which has an equal number of atoms of all the elements on both sides of the chemical equation is called a balanced chemical equation. The law of conservation of mass states that mass can neither be created nor destroyed. Hence, in a chemical reaction, the total mass of reactants should be equal to the total mass of the products. It means that the total number of atoms of each element should be equal on both sides of a chemical equation. Hence, it is for this reason that chemical equations should be balanced.

Answer 2

The assertion is True but reason is False.

• The number of atoms are same before and after reaction since it follows Law of conservation of Mass.
• The reason statement should be present as, any chemical equation can be balanced because the mass may not be same on both sides of the equation.
• Law of conservation of mass was stated by Antoine Lavoisier in 1789.
• He states that mass neither be created nor destroyed.