Question

keesha performed a chemical reaction and the products looked quite different from the reactants. she knew the amount of matter had not changed due to the law of conservation of mass. according to the law of conservation of mass, what happens in a chemical reaction?
a. matter is not created or destroyed and the same amount of mass remains.
b. a new kind of matter is created and the amount of mass either increases or decreases.
c. matter is not created or destroyed and the amount of mass may change after the reaction.
d. new matter is created and changes form so that the mass of the reactants and the products will almost be equal.

Explanation:

The law of conservation of mass states that in a chemical reaction, matter is neither created nor destroyed. This means the total mass of the reactants is equal to the total mass of the products. Option A aligns with this principle. Option B is incorrect because new matter isn't "created" in the sense of adding mass (matter is just rearranged), and mass doesn't increase or decrease. Option C is wrong as the amount of mass does not change after the reaction. Option D is incorrect because it's not that "new matter is created" (matter is just re - arranged), and it's not "almost equal" but exactly equal in mass according to the law.

Answer:

A. Matter is not created or destroyed and the same amount of mass remains.