Question

If the mass of the products measured 120 g, what would be the mass of the reactants?

A: 30 g
B: 60 g
C: 120 g
D: 240 g

Answer 1

According to law of conservation of mass, mass of reactant = mass of products

So answer is C

Hope it helps!

Answer 2

Answer: The correct answer option(C).

Explanation:

In a balanced chemical reaction mass of the reactant are always equal to mass of the products. Also known as Law of Conservation of Mass  which states that " mass can nor be created nor be destroyed in a chemical reaction."

So, the mass of the reactant will be equal to the mass of products.That is 120 grams.

Hence, the correct answer option(C).