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Molar massCalcium carbonate
Molar mass of CaCO3 (Calcium carbonate)
The molar mass of CaCO3 is 100.09 g/mol.
Limestone, marble and chalk; it fizzes with acids to release CO₂.
Step-by-step calculation
Add up the atomic masses of every atom in the formula:
1 × 40.078 + 1 × 12.011 + 3 × 15.999 = 100.09 g/mol
| Element | Atoms | Atomic mass (u) | Subtotal (g/mol) | % by mass |
|---|---|---|---|---|
| Calcium (Ca) | 1 | 40.078 | 40.078 | 40.04% |
| Carbon (C) | 1 | 12.011 | 12.011 | 12.00% |
| Oxygen (O) | 3 | 15.999 | 47.997 | 47.96% |
| Molar mass of CaCO3 | 100.09 g/mol | |||
Moles to grams for CaCO3
Multiply the number of moles by 100.09 g/mol to get the mass, and divide a mass by 100.09 g/mol to get the moles.
| Amount (mol) | Mass (g) | Mass (g) | Amount (mol) |
|---|---|---|---|
| 0.1 mol | 10.01 g | 1 g | 0.0100 mol |
| 0.25 mol | 25.02 g | 5 g | 0.0500 mol |
| 0.5 mol | 50.04 g | 10 g | 0.0999 mol |
| 1 mol | 100.09 g | 50 g | 0.4996 mol |
| 2 mol | 200.17 g | 100 g | 0.9991 mol |
| 5 mol | 500.43 g | 500 g | 4.9957 mol |
Experiments that use calcium carbonate
⚖️ Calculate any other formulaFrequently asked questions
What is the molar mass of CaCO3?
The molar mass of CaCO₃ (calcium carbonate) is 100.09 g/mol, so one mole of calcium carbonate weighs 100.09 grams.
How do you calculate the molar mass of CaCO3?
Multiply each element’s atomic mass by the number of atoms in the formula and add the results: 1 × 40.078 + 1 × 12.011 + 3 × 15.999 = 100.09 g/mol.
What percentage of CaCO3 is oxygen?
Oxygen makes up 47.96% of the mass of CaCO₃.
How many grams are in one mole of CaCO3?
One mole of CaCO₃ has a mass of 100.09 grams, and contains 6.022 × 10²³ formula units.