Question

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?

It is a diatomic molecule that can’t be broken down by physical means.
It is a diatomic molecule that can’t be broken down by chemical means.
It is a compound that can be broken down by physical means.
It is a compound that can be broken down by chemical means.
GPT-4o mini
The correct statement that describes calcium carbonate (CaCO3) is:

**It is a compound that can be broken down by chemical means.**

This is because CaCO3 can decompose into calcium oxide (CaO) and carbon dioxide (CO2) when heated, indicating that it can be broken down through a chemical reaction, not physical means. Additionally, it is not a diatomic molecule; it consists of multiple atoms from different elements, making it a compound.

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