Molar mass

Molar Mass of Magnesium Sulfate Heptahydrate

The molar mass of magnesium sulfate heptahydrate (MgSO4·7H2O) is 246.466 g/mol.

Magnesium Sulfate Heptahydrate at a glance

PropertyValue
Molar mass246.466 g/mol
Molecular weight246.466 u
Chemical formulaMgSO4·7H2O
Monoisotopic mass246.010724 u
CAS number10034-99-8
PubChem CID24843

How to calculate the molar mass of magnesium sulfate heptahydrate

1 × 24.305 + 1 × 32.06 + 11 × 15.999 + 14 × 1.008 = 246.466 g/mol

  1. Count the atoms in MgSO4·7H2O: Mg 1, S 1, O 11, H 14.
  2. Multiply each atom count by the atomic weight of the element.
  3. Add the results to get 246.466 g/mol.

Elemental composition of magnesium sulfate heptahydrate

ElementAtomsAtomic weightMass (g/mol)Mass %
Mg Magnesium124.30524.3059.8614%
S Sulfur132.0632.0613.008%
O Oxygen1115.999175.98971.405%
H Hydrogen141.00814.1125.7257%

Grams and moles of magnesium sulfate heptahydrate

AmountEquals
1 g0.0040574 mol
10 g0.040574 mol
100 g0.40574 mol
0.1 mol24.647 g
1 mol246.47 g
1 g, in particles2.4434 × 10^21