ron is found in nature as several different ores. Several are composed of just iron and oxygen. One is called hematite (as in the Ishpemig Hematites). Another is called magnetite. Magnetite contains 72.35% Fe. What is the empirical formula of magnetite? (Type in the formula without spaces or subscripts such as H2O)

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.