The chemical formula of Iron III oxide is Fe2O3. It is actually acquired from the mineral ore termed hematite. It is mined after which processed to obtain iron oxide for extracting the metal. Iron is also known as Ferrum in Latin. The valency of this metal is two and three. https://spherical-vanadium-powder37147.blogdosaga.com/38794164/an-unbiased-view-of-3d-utskrifter-metall