Question

How do the products and reactants of a chemical change compare?

The mass of the products is greater than the mass of the reactants because energy is taken in by the reaction.

The mass of the products equals the mass of the reactants because the same matter is present.

The mass of the products equals the mass of the reactants because there is no energy involved in the reaction.

The mass of the products is less than the mass of the reactants because energy is given off by the reaction.

Answer 1

The correct answer for this question is "The mass of the products equals the mass of the reactants because the same matter is present."

All chemical reactions follow the Law of Conservation of Mass which states that mass cannot be created nor destroyed. This means that mass is constant before and after a process. If ever it seems like the mass is not the same, it is possible that the missing mass was converted to something else.