Molar mass

Molar Mass of Iron(II) Sulfide

The molar mass of iron(II) sulfide (FeS) is 87.905 g/mol.

Iron(II) Sulfide at a glance

PropertyValue
Molar mass87.905 g/mol
Molecular weight87.905 u
Chemical formulaFeS
Monoisotopic mass87.9070075 u
CAS number1317-37-9
PubChem CID14828

How to calculate the molar mass of iron(II) sulfide

1 × 55.845 + 1 × 32.06 = 87.905 g/mol

  1. Count the atoms in FeS: Fe 1, S 1.
  2. Multiply each atom count by the atomic weight of the element.
  3. Add the results to get 87.905 g/mol.

Elemental composition of iron(II) sulfide

ElementAtomsAtomic weightMass (g/mol)Mass %
Fe Iron155.84555.84563.529%
S Sulfur132.0632.0636.471%

Grams and moles of iron(II) sulfide

AmountEquals
1 g0.011376 mol
10 g0.11376 mol
100 g1.1376 mol
0.1 mol8.7905 g
1 mol87.905 g
1 g, in particles6.8507 × 10^21