The molar mass of calcium carbonate (CaCO₃) can be calculated by adding the atomic masses of its constituent elements:
- Calcium (Ca): approximately 40.08 g/mol
- Carbon (C): approximately 12.01 g/mol
- Oxygen (O): approximately 16.00 g/mol (and there are three oxygen atoms in calcium carbonate)
The calculation is as follows:
\[ \text{Molar Mass of CaCO}_3 = (\text{Ca}) + (\text{C}) + 3 \times (\text{O}) \] \[ = 40.08 , \text{g/mol} + 12.01 , \text{g/mol} + 3 \times 16.00 , \text{g/mol} \] \[ = 40.08 , \text{g/mol} + 12.01 , \text{g/mol} + 48.00 , \text{g/mol} \] \[ = 100.09 , \text{g/mol} \]
Therefore, the molar mass of calcium carbonate (CaCO₃) is approximately 100.09 g/mol.