Calcium carbonate (CaCO3) is a white solid with no odor. When CaCO3 is heated, the resulting substances are calcium oxide (CaO) and carbon dioxide (CO2). CaO is a white to gray solid with no odor, and CO2 is a gas with no odor and color.Which statement describes CaCO3?

CaCO3 is made of calcium, carbon, and oxygen atoms chemically bonded together, so it is a compound, not a diatomic molecule. Heating it causes a chemical change that produces two different substances, CaO and CO2. Therefore, CaCO3 is a compound that can be broken down by chemical means.

AI-written and checked against the verified answer.