The chemical formula of Iron III oxide is Fe2O3. It really is obtained from the mineral ore termed hematite. It can be mined and afterwards processed to get iron oxide for extracting the metal. Iron is also called Ferrum in Latin. The valency of the metal is 2 and three. https://3d-filament25702.blogofchange.com/39506768/the-basic-principles-of-silica-aerogel