Molar mass

Molar Mass of Iron(III) Sulfate

The molar mass of iron(III) sulfate (Fe2(SO4)3) is 399.858 g/mol.

Iron(III) Sulfate at a glance

PropertyValue
Molar mass399.858 g/mol
Molecular weight399.858 u
Chemical formulaFe2(SO4)3
Monoisotopic mass399.725062 u
CAS number10028-22-5
PubChem CID24826

How to calculate the molar mass of iron(III) sulfate

2 × 55.845 + 3 × 32.06 + 12 × 15.999 = 399.858 g/mol

  1. Count the atoms in Fe2(SO4)3: Fe 2, S 3, O 12.
  2. Multiply each atom count by the atomic weight of the element.
  3. Add the results to get 399.858 g/mol.

Elemental composition of iron(III) sulfate

ElementAtomsAtomic weightMass (g/mol)Mass %
Fe Iron255.845111.6927.932%
S Sulfur332.0696.1824.054%
O Oxygen1215.999191.98848.014%

Grams and moles of iron(III) sulfate

AmountEquals
1 g0.0025009 mol
10 g0.025009 mol
100 g0.25009 mol
0.1 mol39.986 g
1 mol399.86 g
1 g, in particles1.5061 × 10^21