Answer: Iron is present in the earths crust in many types
Chapter 19, Problem 19.16(choose chapter or problem)
Iron is present in the earths crust in many types of minerals. The iron oxide minerals are hematite (Fe2O3) and magnetite (Fe3O4). What is the oxidation state of iron in each mineral? The iron ions in magnetite are a mixture of Fe21 and Fe31 ions. What is the ratio of Fe31 to Fe21 ions in magnetite? The formula for magnetite is usually written as FeO ? Fe2O3. Does this make sense? Explain
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