Calcium carbonate, also known as chalk, and also known as the formula CaC03. The molecular composition of chalk is made of one carbon atom, three oxygen atoms, and two hydrogen atoms. The physical properties of CaC03 is a very fine white powdery substance that has zero odor. The density of calcium carbonate is 2.71 g/ml, and has a melting point of 1,339 Celsius. It also has a molar mass of 100.0869 g/mol. Calcium is used in the real world, for keeping the bones strong and healthy, plus the muscles, the nervous system and the heart healthy too. Calcium Carbonate can also be used to cure or relieve an upset stomach, heartburn or acid indigestion. Calcium is a need for the body and Calcium is in Calcium Carbonate. CaC03 is found in lots of rocks and minerals.

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