Iron(II) oxide (FeO) is black.
The chemical formula of goethite is FeO(OH).
Iron Oxide
fe + O2 = feO
Rust is hydrated iron oxides: Fe2O3.nH2O + FeO(OH).
The chemical formula for iron(III) hydroxide is Fe(OH)3.
H2o + fe------ feo+h2
The iron itself is usually found in the form of magnetite(Fe3O4), hematite (Fe2O3), goethite (FeO(OH)), limonite (FeO(OH).n(H2O)) or siderite (FeCO3). Source:Wiki
You say it like fey-o.
The oxidation number of Fe in FeO (iron oxide) is +2. This is because oxygen typically has an oxidation number of -2, and in a neutral compound like FeO, the oxidation numbers must balance out to zero.
tu = you .. eres = are .. feo = ugly .. feo is male, fea is female YOU ARE UGLY
feo means ugly in English
FeO is the chemical formula for iron(II) oxide, also known as ferrous oxide. It is a black-colored mineral that is commonly found in nature as a component of rust. It is used in various industrial applications, including in the production of steel.