Molar Mass of FeO (Iron(II) Oxide)

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 FeO?

Answer

M(FeO) =
71.844 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 ≈ 77.73%
Ooxygen115.99915.999 w ≈ 22.27%
Σ = 71.844 g/mol w = 100%

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

Mass fractions of the elements

O 22.27%

Related Calculations

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Recalculate with different values ↑

Molar masses of substances nearby

FormulaM, g/mol
Cl₂ (chlorine)70.90
MnO (manganese(II) oxide)70.937
C₃H₅NO (acrylamide)71.079
FeO (iron(II) oxide)71.844
C₃H₄O₂ (acrylic acid)72.063
C₄H₈O (butanone)72.107
CaS (calcium sulfide)72.14

FAQ

What is the molar mass of FeO?

M(FeO) = 71.844 g/mol

How to calculate the molar mass of FeO?

Add up the atomic weights of all the atoms in the formula: 55.845 + 15.999 = 71.844 g/mol.

How many grams are in 2 moles of FeO?

m = n × M = 2 mol × 71.844 g/mol = 143.688 g.

See Also