Which statement is true regarding a chemical reaction? A. even if the total number of atoms does not change, mass may not be conserved in the reaction. B. the total number of atoms does not change, so mass is conserved in the reaction. C. the total number of atoms changes, so mass is conserved in the reaction. D. even if the total number of atoms changes, mass may not be conserved in the reaction.

1 answer

The correct statement regarding a chemical reaction is: B. the total number of atoms does not change, so mass is conserved in the reaction.

According to the Law of Conservation of Mass, during a chemical reaction, the total mass of the reactants is equal to the total mass of the products, meaning that the total number of atoms remains constant, and thus mass is conserved.