according to the law of conservation of mass, if the products of a reaction have a mass of 64.0g, then the total mass of the reactants

a. must be less than 64.0g
b. must be equal to 64.0g
c. must be more than 64.0g
d. is not related to the mass of the products

b. must be equal to 64.0

64.0g*

correct.

To answer this question, let's first understand the Law of Conservation of Mass. This law states that in a closed system, the mass of the reactants before a chemical reaction is equal to the mass of the products after the reaction. This means that no mass is lost or gained during a chemical reaction.

Now, in this particular case, if the products of a reaction have a mass of 64.0g, according to the Law of Conservation of Mass, the total mass of the reactants must be equal to 64.0g. This is because the mass of the reactants must be conserved in the reaction and cannot change.

Therefore, the correct answer to this question is: b. must be equal to 64.0g.

surely you can use some deductive reason to venture a guess. I will be happy to critique your thinking.