Fe->FeCL²->Fe(OH)²->FeO

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The chemical reactions you have listed are as follows:

Fe -> FeCl2 (Iron reacts with hydrochloric acid to form iron(II) chloride)FeCl2 -> Fe(OH)2 (Iron(II) chloride reacts with a base to form iron(II) hydroxide)Fe(OH)2 -> FeO (Iron(II) hydroxide undergoes dehydration to form iron(II) oxide)

These reactions represent the transformation of iron from its elemental form to iron oxide through several intermediate steps involving chemical reactions with different compounds.