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Mods. Empirical Formula of an Oxide of Tin. Purpose: Within completing this lab, it was intended for the experimenter (student) to determine the empirical formula of an oxide of Tin by means of experimenting. This goal would be accomplished by finding the masses of the various substances experimented with, which 30 mesh tin, Tin Oxide, and Oxygen.
Iron oxide has most often has 2 atoms of iron per molecule. There are two forms of iron oxide, FeO (which has one iron atom) and Fe2O3. Iron can take on a valence of II or III. Confusing. There are actually addition formulas for other iron oxides, too, including magnetite (Fe3O4).