According to the Law of Conservation of Mass, the mass of the products of a chemical reaction will always equal which of the following?

• A. The volume of the reactants
• B. The mass of the reactants
• C. The total energy released during the reaction
• D. The number of atoms in the products

Answer: (B)

Verified step by step guidance

1. Understand the Law of Conservation of Mass, which states that mass cannot be created or destroyed in a chemical reaction.
2. Recognize that this law implies the total mass of the reactants before the reaction must be equal to the total mass of the products after the reaction.
3. Note that volume, energy, or number of atoms individually do not necessarily remain constant during a reaction, but mass does.
4. Therefore, the mass of the products will always equal the mass of the reactants.
5. This principle is fundamental in balancing chemical equations and understanding reaction stoichiometry.