Molar Mass of Sodium sulfate
Na2SO4 — 142.036 g/mol, worked out element by element.
Molar mass of Sodium sulfate, Na₂SO₄
142.036 g/mol
Molecular weight 142.036 · 7 atoms per formula unit
Also known as: na2so4, sodium sulphate, glauber's salt.
A drying agent in the organic lab, and a by-product of many industrial syntheses.
How 142.036 g/mol is worked out
| Element | Atoms | Atomic mass | Mass | % of total |
|---|---|---|---|---|
| Oxygen | 4 | 15.999 | 63.996 | 45.06% |
| Sodium | 2 | 22.99 | 45.980 | 32.37% |
| Sulfur | 1 | 32.06 | 32.060 | 22.57% |
| Total | 7 | 142.036 | 100% |
M = 4 × 15.999 + 2 × 22.990 + 1 × 32.060 = 142.036 g/mol
Grams to moles for Sodium sulfate
| Mass | Moles | Formula units |
|---|---|---|
| 1 g | 0.0070 mol | 4.240 × 10^21 |
| 10 g | 0.0704 mol | 4.240 × 10^22 |
| 25 g | 0.1760 mol | 1.060 × 10^23 |
| 50 g | 0.3520 mol | 2.120 × 10^23 |
| 100 g | 0.7040 mol | 4.240 × 10^23 |
| 250 g | 1.7601 mol | 1.060 × 10^24 |
| 142.036 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 sulfate?
The molar mass of Sodium sulfate (Na2SO4) is 142.036 g/mol. That is the sum of the standard atomic weights of all 7 atoms in one formula unit: 4 × 15.999 + 2 × 22.990 + 1 × 32.060 = 142.036.
What is the molecular weight of Sodium sulfate?
142.036 — 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 142.04 and a molar mass of 142.04 g/mol are the same answer.
How many moles are in 100 g of Sodium sulfate?
100 ÷ 142.036 = 0.7040 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 sulfate?
By mass, Sodium sulfate is 45.06% oxygen, 32.37% sodium, 22.57% sulfur. Each element's share is its total mass in the formula divided by 142.036.
How many atoms are in one formula unit of Sodium sulfate?
7: 4 oxygen, 2 sodium, 1 sulfur. One mole contains 6.02214076 × 10²³ formula units, so a mole of Sodium sulfate contains 7 × 6.022 × 10²³ atoms in total.