Iron(III) oxide · Fe2O3

Iron(III) oxide: formula Fe2O3, atom count, element breakdown and calculated molar mass.

CompoundFe₂O₃

Fe₂O₃

Molar mass159.687 g/mol

Atoms5

Elements2

Oxygen

3 × 15.999 · 30.06%

47.9970

Iron

2 × 55.845 · 69.94%

111.6900

The formula Fe₂O₃ contains 5 atoms in total. Numbers after element symbols show how many atoms of each element are present.

Molar mass is the sum of the contributions shown above. The percentages show how much each element contributes to the total mass.