Fe-Fe2(SO4)3-Fe(OH)3-Fe2O3-Fe-FeS-H2S-SO2-SO3-H2SO4-Na2SO4-BaSO4

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Iron (Fe) is a transition metal with various oxidation states. In this list of compounds, we have:

Fe - Elemental ironFe2(SO4)3 - Iron(III) sulfateFe(OH)3 - Iron(III) hydroxideFe2O3 - Iron(III) oxide (rust)FeS - Iron(II) sulfideH2S - Hydrogen sulfide gasSO2 - Sulfur dioxide gasSO3 - Sulfur trioxide gasH2SO4 - Sulfuric acidNa2SO4 - Sodium sulfateBaSO4 - Barium sulfate

These compounds contain iron and sulfur in various forms and oxidation states, along with other elements such as oxygen and sodium. Iron is a versatile element with many useful compounds and applications in chemistry and industry.