The chemical formula of Iron III oxide is Fe2O3. It's received from a mineral ore known as hematite. It is mined and then processed to acquire iron oxide for extracting the metal. Iron is also referred to as Ferrum in Latin. The valency of this metal is two and 3. https://metal-3d-printer61582.59bloggers.com/39245843/the-5-second-trick-for-b4c