Iron(II) oxide (FeO) is black.
The chemical formula of goethite is FeO(OH).
Iron Oxide
2 FeO
Fe3O2. But it's not right! Oxygen forms a 2- ion and iron can be 2+ or 3+. So the formulae of iron oxide can be FeO or Fe2O3.
fe + O2 = feO
Rust is hydrated iron oxides: Fe2O3.nH2O + FeO(OH).
To balance the chemical equation FeO + H2SO4 → Fe2(SO4)3 + H2O, you would need to adjust the coefficients of the compounds. One balanced equation would be 3FeO + H2SO4 → Fe2(SO4)3 + H2O.
The chemical formula for iron(III) hydroxide is Fe(OH)3.
yo soy feo - I'm an ugly person (more like "I have an ugly personality")
Limonite is an iron ore; the approximative composition is FeO(OH).nH2O.
Look you bad ugly pig
FeO