Question

Which statement is a correct expression of the Law of Conservation of Mass?

A.
The total mass is unpredictable in a chemical reaction.

B.
The total mass remains the same during a chemical reaction.

C.
The total mass decreases during a chemical reaction.

D.
The total mass increases in a chemical reaction.

Answer 1

Law of Conservation of Mass = mass is conserved so it should remain the same before and after the reaction

Answer 2

It is B. This can be proven because of the fact that matter cannot be created nor destroyed, and all of the elements in your reactant must be in the product as well.