The Chemical formula of Iron III oxide is Fe2O3. It truly is acquired from a mineral ore called hematite. It is mined and then processed to acquire iron oxide for extracting the metal. Iron is also known as Ferrum in Latin. The valency of this metal is two and three. https://3dprinterdesigns05825.tribunablog.com/the-5-second-trick-for-b4c-53188533