Molar Mass of Sodium sulfite
Na2SO3 — 126.037 g/mol, worked out element by element.
Molar mass of Sodium sulfite, Na₂SO₃
126.037 g/mol
Molecular weight 126.037 · 6 atoms per formula unit
Also known as: na2so3, sodium sulphite.
An oxygen scavenger used to stop corrosion in boiler water.
How 126.037 g/mol is worked out
| Element | Atoms | Atomic mass | Mass | % of total |
|---|---|---|---|---|
| Oxygen | 3 | 15.999 | 47.997 | 38.08% |
| Sodium | 2 | 22.99 | 45.980 | 36.48% |
| Sulfur | 1 | 32.06 | 32.060 | 25.44% |
| Total | 6 | 126.037 | 100% |
M = 3 × 15.999 + 2 × 22.990 + 1 × 32.060 = 126.037 g/mol
Grams to moles for Sodium sulfite
| Mass | Moles | Formula units |
|---|---|---|
| 1 g | 0.0079 mol | 4.778 × 10^21 |
| 10 g | 0.0793 mol | 4.778 × 10^22 |
| 25 g | 0.1984 mol | 1.195 × 10^23 |
| 50 g | 0.3967 mol | 2.389 × 10^23 |
| 100 g | 0.7934 mol | 4.778 × 10^23 |
| 250 g | 1.9835 mol | 1.195 × 10^24 |
| 126.037 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.
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Frequently Asked Questions
What is the molar mass of Sodium sulfite?
The molar mass of Sodium sulfite (Na2SO3) is 126.037 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 × 32.060 = 126.037.
What is the molecular weight of Sodium sulfite?
126.037 — 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 126.04 and a molar mass of 126.04 g/mol are the same answer.
How many moles are in 100 g of Sodium sulfite?
100 ÷ 126.037 = 0.7934 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 sulfite?
By mass, Sodium sulfite is 38.08% oxygen, 36.48% sodium, 25.44% sulfur. Each element's share is its total mass in the formula divided by 126.037.
How many atoms are in one formula unit of Sodium sulfite?
6: 3 oxygen, 2 sodium, 1 sulfur. One mole contains 6.02214076 × 10²³ formula units, so a mole of Sodium sulfite contains 6 × 6.022 × 10²³ atoms in total.