Mn2O3.
The formula for manganese(III) sulfate is Mn2(SO4)3.
If it existed the formula would be Cu2O3
The chemical formula for antimony III oxide is Sb2O3.
"Chromium(III) oxide", or "dichromium trioxide".
The chemical formula for iron (III) oxide is Fe2O3, where Fe represents iron and O represents oxygen.
The formula for manganese(III) sulfate is Mn2(SO4)3.
Phosphorus(III) oxide has the formula P2O3 but it exists as the molecule of P4O6
The chemical formula for manganese(III) sulfite is Mn2(SO3)3.
FeO for ferrous oxide, ( iron(II) oxide); Fe2O3 for ferric oxide, (iron(III) oxide) and Fe3O4 for ferrous ferric oxide, (iron (II,III) oxide)
If it existed the formula would be Cu2O3
Formula: V(IO3)3
The chemical formula for antimony III oxide is Sb2O3.
Nickel(II) Oxide = NiO Nickel(III) Oxide= Ni2O3
"Chromium(III) oxide", or "dichromium trioxide".
Nickel(II) Oxide = NiO Nickel(III) Oxide= Ni2O3
The formula is Ti2O3
The chemical formula for iron (III) oxide is Fe2O3, where Fe represents iron and O represents oxygen.