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.
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