Question

Define law of conservation of mass.

pls answer this...​

Answer 1

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.

Explanation:

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Answer 2

Answer:

in a chemical change the mass of the reactants is always equal to the product I.e. mass can neither be created nor be destroyed.

e.g.

2Mg + O2 --> 2MgO