Molar mass

Molar Mass of Heme

The molar mass of heme (C34H32FeN4O4) is 616.499 g/mol.

Heme at a glance

PropertyValue
Molar mass616.499 g/mol
Molecular weight616.499 u
Chemical formulaC34H32FeN4O4
Monoisotopic mass616.177292 u
CAS number14875-96-8
PubChem CID26945

How to calculate the molar mass of heme

34 × 12.011 + 32 × 1.008 + 1 × 55.845 + 4 × 14.007 + 4 × 15.999 = 616.499 g/mol

  1. Count the atoms in C34H32FeN4O4: C 34, H 32, Fe 1, N 4, O 4.
  2. Multiply each atom count by the atomic weight of the element.
  3. Add the results to get 616.499 g/mol.

Elemental composition of heme

ElementAtomsAtomic weightMass (g/mol)Mass %
C Carbon3412.011408.37466.241%
H Hydrogen321.00832.2565.2321%
Fe Iron155.84555.8459.0584%
N Nitrogen414.00756.0289.0881%
O Oxygen415.99963.99610.381%

Grams and moles of heme

AmountEquals
1 g0.0016221 mol
10 g0.016221 mol
100 g0.16221 mol
0.1 mol61.65 g
1 mol616.5 g
1 g, in particles9.7683 × 10^20