Molar mass of magnesium sulfate (MgSO4)

The molar mass of magnesium sulfate (MgSO4) is 120.361 g/mol.

Step-by-step calculation

ElementAtomsAtomic massSubtotal
Magnesium × 1 24.305 = 24.305
Sulfur × 1 32.06 = 32.06
Oxygen × 4 15.999 = 63.996
Total120.361 g/mol

Percent composition by element

  • Magnesium 20.19%
  • Sulfur 26.64%
  • Oxygen 53.17%

Magnesium sulfate facts

  • Magnesium sulfate is a white crystalline salt that is very soluble in water and is most often sold as the heptahydrate known as Epsom salt.
  • It is used in bath soaks, as a fertilizer for magnesium-poor soils, and in hospitals to treat low magnesium levels and eclampsia.
  • The anhydrous form absorbs water so strongly that chemists use it as a drying agent for organic liquids.

Try another formula

H2O NaCl CO2 C6H12O6 H2SO4 Ca(OH)2 CuSO4·5H2O C8H10N4O2

Could not read that formula

Related compounds

MgSO4·7H2O Magnesium sulfate heptahydrate H2SO4 Sulfuric acid CuSO4 Copper(II) sulfate MgO Magnesium oxide KAl(SO4)2·12H2O Potassium alum SO2 Sulfur dioxide

FAQ

What is the molar mass of MgSO4?

The molar mass of magnesium sulfate (MgSO4) is 120.361 g/mol.

How do you calculate the molar mass of MgSO4?

Multiply the atomic mass of each element by the number of its atoms in MgSO4, then add the results: 1 × 24.305 (Mg) + 1 × 32.06 (S) + 4 × 15.999 (O) = 120.361 g/mol.

What percentage of MgSO4 is Oxygen?

Oxygen makes up 53.17% of the mass of magnesium sulfate (MgSO4).