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|Molecular formula|| CO2−|
|Molar mass||60.01 g mol-1|
|Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)|
A carbonate is a chemical compound that has the carbonate ion, CO2−
3. This ion is made of carbon and oxygen. The name may also mean an ester of carbonic acid, an organic compound containing the carbonate group C(=O)(O–)2 of carbon and oxygen. They have a valency of 1.