The formula FeSO4 is iron(II) sulfate, which is formed when iron reacts with sulfur and oxygen to produce iron(II) sulfide (FeS) and sulfur trioxide (SO3), followed by the reaction of the sulfur trioxide with water to produce sulfuric acid (H2SO4).
The formula FeSO4 is iron(II) sulfate, which is formed when iron reacts with sulfur and oxygen to produce iron(II) sulfide (FeS) and sulfur trioxide (SO3), followed by the reaction of the sulfur trioxide with water to produce sulfuric acid (H2SO4).