The Chemical formula of Iron III oxide is Fe2O3. It is attained from the mineral ore named hematite. It truly is mined then processed to obtain iron oxide for extracting the metal. Iron is also referred to as Ferrum in Latin. The valency of this metal is 2 and three. https://3d-printed-house58146.newbigblog.com/45409422/the-5-second-trick-for-molybdenum-disilicide-powder