Molar Mass of Fe2O3 (Iron(III) 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 Fe2O3?

Answer

M(Fe2O3) =
159.687 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
Feiron255.845111.690 w ≈ 69.94%
Ooxygen315.99947.997 w ≈ 30.06%
Σ = 159.687 g/mol w = 100%

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

Mass fractions of the elements

O 30.06%

Related Calculations

See Also

Recalculate with different values ↑

Molar masses of substances nearby

FormulaM, g/mol
SrCl₂ (strontium chloride)158.52
Tb (terbium)158.93
CuSO₄ (cupric sulfate)159.60
Fe₂O₃ (iron(III) oxide)159.687
Br₂ (bromine)159.808
KC₆H₅CO₂ (potassium benzoate)160.213
ZnSO₄ (zinc sulfate)161.44

FAQ

What is the molar mass of Fe2O3?

M(Fe₂O₃) = 159.687 g/mol

How to calculate the molar mass of Fe₂O₃?

Add up the atomic weights of all the atoms in the formula: 2 × 55.845 + 3 × 15.999 = 159.687 g/mol.

How many grams are in 2 moles of Fe₂O₃?

m = n × M = 2 mol × 159.687 g/mol = 319.374 g.

See Also