Molar Mass of Calcium sulfate
CaSO4 — 136.134 g/mol, worked out element by element.
Molar mass of Calcium sulfate, CaSO₄
136.134 g/mol
Molecular weight 136.134 · 6 atoms per formula unit
Also known as: caso4, anhydrite, calcium sulphate.
The anhydrous form of gypsum; taking up water is what makes plaster set.
How 136.134 g/mol is worked out
| Element | Atoms | Atomic mass | Mass | % of total |
|---|---|---|---|---|
| Oxygen | 4 | 15.999 | 63.996 | 47.01% |
| Calcium | 1 | 40.078 | 40.078 | 29.44% |
| Sulfur | 1 | 32.06 | 32.060 | 23.55% |
| Total | 6 | 136.134 | 100% |
M = 4 × 15.999 + 1 × 40.078 + 1 × 32.060 = 136.134 g/mol
Grams to moles for Calcium sulfate
| Mass | Moles | Formula units |
|---|---|---|
| 1 g | 0.0073 mol | 4.424 × 10^21 |
| 10 g | 0.0735 mol | 4.424 × 10^22 |
| 25 g | 0.1836 mol | 1.106 × 10^23 |
| 50 g | 0.3673 mol | 2.212 × 10^23 |
| 100 g | 0.7346 mol | 4.424 × 10^23 |
| 250 g | 1.8364 mol | 1.106 × 10^24 |
| 136.134 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 Calcium sulfate?
The molar mass of Calcium sulfate (CaSO4) is 136.134 g/mol. That is the sum of the standard atomic weights of all 6 atoms in one formula unit: 4 × 15.999 + 1 × 40.078 + 1 × 32.060 = 136.134.
What is the molecular weight of Calcium sulfate?
136.134 — 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 136.13 and a molar mass of 136.13 g/mol are the same answer.
How many moles are in 100 g of Calcium sulfate?
100 ÷ 136.134 = 0.7346 mol. To convert any mass to moles, divide by the molar mass; to go the other way, multiply.
What is the percent composition of Calcium sulfate?
By mass, Calcium sulfate is 47.01% oxygen, 29.44% calcium, 23.55% sulfur. Each element's share is its total mass in the formula divided by 136.134.
How many atoms are in one formula unit of Calcium sulfate?
6: 4 oxygen, 1 calcium, 1 sulfur. One mole contains 6.02214076 × 10²³ formula units, so a mole of Calcium sulfate contains 6 × 6.022 × 10²³ atoms in total.