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1. In a chemical reaction

a. the mass of the reactants equals the mass of the products.
b. the mass of the products is greater than the mass of reactants.
c.the number of atoms in the reactants and products must change.
d. energy as heat must be added to the reactants.

1 Answer

6 votes

Answer:

A

Step-by-step explanation:

Law of conservation of matter

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