Molar Mass of Fe (Iron)

Molar Mass Calculator
Chemical formula Write symbols with a capital letter: CoCl2 is cobalt chloride, COCl2 is phosgene. A hydrate takes a dot: CuSO4·5H2O or CuSO4.5H2O

What is the molar mass of Fe?

Answer

M(Fe) =
55.845 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024).

Contribution of each element
Element Atoms, n Atomic weight, A n × A, g/mol Mass fraction, w
Feiron155.84555.845 w = 100.00%

Atomic weights: CIAAW, Abridged Standard Atomic Weights (2024)

See Also

Recalculate with different values ↑

Neighbouring elements of the periodic table

FormulaM, g/mol
V (vanadium)50.942
Cr (chromium)51.996
Mn (manganese)54.938
Fe (iron)55.845
Co (cobalt)58.933
Ni (nickel)58.693
Cu (copper)63.546

FAQ

What is the molar mass of Fe?

M(Fe) = 55.845 g/mol

How is the molar mass of iron different from its atomic weight?

Only in units: the relative atomic mass Ar(Fe) = 55.845 has no unit, and the molar mass M(Fe) = 55.845 g/mol is the mass of one mole of atoms (6.022 × 10²³ of them).

How many grams are in 2 moles of Fe?

m = n × M = 2 mol × 55.845 g/mol = 111.690 g.

See Also