Question

What does the following statement mean? In a chemical reaction, the total mass of the reactants is equal to the total mass of the products.

• A. There is no change in the mass during a chemical reaction
• B. Chemical energy nullifies the mass
• C. Those reactions are reversible
• D. Catalysts used will make up for the lost mass

Answer 1

The correct option is A

There is no change in the mass during a chemical reaction

Lavoisier proposed the law of conservation of mass which states that " Matter can be neither created nor destroyed in a chemical reaction". It can also be stated as

"In a chemical reaction, the total mass of the reactants is equal to the total mass of the products" This means there is no change in mass during a chemical reaction.