Question

explain why the law of conservation of mass is now a days known as law of conservation of mass and energy​

Answer 1

Answer:

Law of conservation of mass states that:-

• Mass and energy both can neither be created nor be destroyed and in a chemical reaction it always get conserved

Thus,

The law of conservation of mass is now a day known as law of conservation of mass and energy.

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Answer 2

Answer:

The law of conservation of mass is now a days known as law of conservation of mass and energy​ because

Explanation:

Mass is not conserved in chemical reactions.

The fundamental conservation law of the universe is the conservation of mass-energy.

This means that the total mass and energy before a reaction in a closed system equals the total mass and energy after the reaction.

Energy cannot be created out of nothing.

Same in the case of conservation of mass in a given chemical reaction remains constant before the Reaction and after the reaction