Molar Mass of Sodium carbonate
Na2CO3 — 105.988 g/mol, worked out element by element.
Molar mass of Sodium carbonate, Na₂CO₃
105.988 g/mol
Molecular weight 105.988 · 6 atoms per formula unit
Also known as: na2co3, washing soda, soda ash.
A primary standard for acid titrations, because it can be dried to a known purity.
How 105.988 g/mol is worked out
| Element | Atoms | Atomic mass | Mass | % of total |
|---|---|---|---|---|
| Oxygen | 3 | 15.999 | 47.997 | 45.29% |
| Sodium | 2 | 22.99 | 45.980 | 43.38% |
| Carbon | 1 | 12.011 | 12.011 | 11.33% |
| Total | 6 | 105.988 | 100% |
M = 3 × 15.999 + 2 × 22.990 + 1 × 12.011 = 105.988 g/mol
Grams to moles for Sodium carbonate
| Mass | Moles | Formula units |
|---|---|---|
| 1 g | 0.0094 mol | 5.682 × 10^21 |
| 10 g | 0.0944 mol | 5.682 × 10^22 |
| 25 g | 0.2359 mol | 1.420 × 10^23 |
| 50 g | 0.4718 mol | 2.841 × 10^23 |
| 100 g | 0.9435 mol | 5.682 × 10^23 |
| 250 g | 2.3588 mol | 1.420 × 10^24 |
| 105.988 g | 1 mol | 6.022 × 10^23 |
For any other amount, use the molar mass calculator, or the molarity calculator to make up a solution of a given concentration.
Related compounds
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Frequently Asked Questions
What is the molar mass of Sodium carbonate?
The molar mass of Sodium carbonate (Na2CO3) is 105.988 g/mol. That is the sum of the standard atomic weights of all 6 atoms in one formula unit: 3 × 15.999 + 2 × 22.990 + 1 × 12.011 = 105.988.
What is the molecular weight of Sodium carbonate?
105.988 — the same number as the molar mass, but as a dimensionless ratio rather than in g/mol. The two terms describe the same arithmetic, so a molecular weight of 105.99 and a molar mass of 105.99 g/mol are the same answer.
How many moles are in 100 g of Sodium carbonate?
100 ÷ 105.988 = 0.9435 mol. To convert any mass to moles, divide by the molar mass; to go the other way, multiply.
What is the percent composition of Sodium carbonate?
By mass, Sodium carbonate is 45.29% oxygen, 43.38% sodium, 11.33% carbon. Each element's share is its total mass in the formula divided by 105.988.
How many atoms are in one formula unit of Sodium carbonate?
6: 3 oxygen, 2 sodium, 1 carbon. One mole contains 6.02214076 × 10²³ formula units, so a mole of Sodium carbonate contains 6 × 6.022 × 10²³ atoms in total.