c
Her prediction is reasonable because the law of conservation of matter states that matter can neither be created nor destroyed in a chemical reaction. Therefore, the mass of the products should equal the mass of the reactants.
a
Her prediction is unreasonable because the law of conservation of matter states that some mass is lost in a chemical reaction, so the mass of the products will be less than 64 g.
b
Her prediction is reasonable because the law of conservation of matter states that the products of a reaction have more mass than the reactants.
c
Her prediction is reasonable because the law of conservation of matter states that matter can neither be created nor destroyed in a chemical reaction.
d
Her prediction is unreasonable because the law of conservation of matter states that matter can neither be created nor destroyed, so the mass of the products will be 64 g.
Her prediction is reasonable because the law of conservation of matter states that matter can neither be created nor destroyed in a chemical reaction. Therefore, the mass of the products should equal the mass of the reactants.