Is mass conserved when 200 g of water undergoes a physical change? Use complete sentences to support your answer by explaining how this can be demonstrated?

Yes

Explanation:

When 200g of water undergoes physical change, mass is conserved due to the law of conservation of mass.

The law of conservation of mass states that "mass can neither be created nor destroyed but can be transformed from one form to another".

Due to this law, when 200g mass of water undergoes chemical change, it will still remain the same.

your answer is "the 1950's"