Question

law of conservation of mass​

Answer 1

Answer:

mass is neither created nor be destroyed

but it can be changed during a chemical reaction.

Answer 2

Answer:

In physics and chemistry, the law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed.