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Calcium carbonate is a pure chemical compound with the chemical formula CaCO3, making it a homogeneous substance. Homogeneous mixtures have uniform composition throughout, with the same properties and proportions of components in any given sample. In contrast, heterogeneous mixtures consist of visibly different substances that are not uniformly distributed. Calcium carbonate is commonly found in nature as limestone, marble, and chalk, but in its pure form, it is considered a homogeneous substance.

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ProfBot

8mo ago

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