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CaSO4.2H2O
| Element | Number | Mass | Percet Composition |
| H | 2 | 1.0079 | 1.45897175712079 |
| S | 1 | 32.07 | 23.2112433033356 |
| O | 4 | 16.00 | 46.3211590712029 |
| Ca | 1 | 40.08 | 29.0086258683408 |
| Total MW = 138.1658 | Total percent composition = 100 |
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Molar mass of calcium sulfate is 136.1406 g/mol Compound name is calcium sulfateConvert between CaSO4 weight and moles
Elemental composition of CaSO4
Sample reactions for CaSO4
Formula in Hill system is CaO4S | ||||||||||||||||||||||||||||||||
Computing molar mass (molar weight)To calculate molar mass of a chemical compound enter its formula and click 'Compute'. In chemical formula you may use:
Molar mass calculator also displays common compound name, Hill formula, elemental composition, mass percent composition, atomic percent compositions and allows to convert from weight to number of moles and vice versa. Computing molecular weight (molecular mass)To calculate molecular weight of a chemical compound enter it's formula, specify its isotope mass number after each element in square brackets.Examples of molecular weight computations: C[14]O[16]2, S[34]O[16]2. Definitions of molecular mass, molecular weight, molar mass and molar weight
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Solution : Molecular mass of `CaSO_(4) = 1 (Ca) + 1 (S) + 4 (O) = 1 (40) + 1 (32) + 4 (16) = 40 + 32 + 64 = 136` a.m.u. <br> Also, mass of sulphur in `CaSO_(4) = 1(32) = 32` a.m.u <br> `therefore` Mass percentage of sulphur in `CaSO_(4) = 32/136 xx 100 = 23.53%`
Molar mass of CaSO4 = 136.1406 g/mol
This compound is also known as Calcium Sulfate.
Convert grams CaSO4 to moles or moles CaSO4 to grams
Molecular weight calculation:
40.078 + 32.065 + 15.9994*4
›› Percent composition by element
| Element | Symbol | Atomic Mass | # of Atoms | Mass Percent |
| Calcium | Ca | 40.078 | 1 | 29.439% |
| Oxygen | O | 15.9994 | 4 | 47.008% |
| Sulfur | S | 32.065 | 1 | 23.553% |
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CaSO4
CAsO4
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›› More information on molar mass and molecular weight
In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together.
Finding molar mass starts with units of grams per mole (g/mol). When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. The formula weight is simply the weight in atomic mass units of all the atoms in a given formula.
If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula weight and multiplying by 100.
A common request on this site is to convert grams to moles. To complete this calculation, you have to know what substance you are trying to convert. The reason is that the molar mass of the substance affects the conversion. This site explains how to find molar mass.
Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance.
Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. These relative weights computed from the chemical equation are sometimes called equation weights.
The atomic weights used on this site come from NIST, the National Institute of Standards and Technology. We use the most common isotopes. This is how to calculate molar mass (average molecular weight), which is based on isotropically weighted averages. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes. For bulk stoichiometric calculations, we are usually determining molar mass, which may also be called standard atomic weight or average atomic mass.