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Molar massSodium carbonate
Molar mass of Na2CO3 (Sodium carbonate)
The molar mass of Na2CO3 is 105.99 g/mol.
Washing soda, an alkaline salt used in glass-making.
Step-by-step calculation
Add up the atomic masses of every atom in the formula:
2 × 22.99 + 1 × 12.011 + 3 × 15.999 = 105.99 g/mol
| Element | Atoms | Atomic mass (u) | Subtotal (g/mol) | % by mass |
|---|---|---|---|---|
| Sodium (Na) | 2 | 22.99 | 45.980 | 43.38% |
| Carbon (C) | 1 | 12.011 | 12.011 | 11.33% |
| Oxygen (O) | 3 | 15.999 | 47.997 | 45.29% |
| Molar mass of Na2CO3 | 105.99 g/mol | |||
Moles to grams for Na2CO3
Multiply the number of moles by 105.99 g/mol to get the mass, and divide a mass by 105.99 g/mol to get the moles.
| Amount (mol) | Mass (g) | Mass (g) | Amount (mol) |
|---|---|---|---|
| 0.1 mol | 10.60 g | 1 g | 0.0094 mol |
| 0.25 mol | 26.50 g | 5 g | 0.0472 mol |
| 0.5 mol | 52.99 g | 10 g | 0.0944 mol |
| 1 mol | 105.99 g | 50 g | 0.4718 mol |
| 2 mol | 211.98 g | 100 g | 0.9435 mol |
| 5 mol | 529.94 g | 500 g | 4.7175 mol |
Frequently asked questions
What is the molar mass of Na2CO3?
The molar mass of Na₂CO₃ (sodium carbonate) is 105.99 g/mol, so one mole of sodium carbonate weighs 105.99 grams.
How do you calculate the molar mass of Na2CO3?
Multiply each element’s atomic mass by the number of atoms in the formula and add the results: 2 × 22.99 + 1 × 12.011 + 3 × 15.999 = 105.99 g/mol.
What percentage of Na2CO3 is oxygen?
Oxygen makes up 45.29% of the mass of Na₂CO₃.
How many grams are in one mole of Na2CO3?
One mole of Na₂CO₃ has a mass of 105.99 grams, and contains 6.022 × 10²³ formula units.