Why do iron oxides have different properties to iron and steel, and oxygen gas?

Answer 1

Because iron oxide is chemically distinct to iron and oxygen. Different materials have different properties.

See this old answer. And also here.

The point is that there are several iron oxides known, and oxidation of iron in steel structures is of vital concern to structural engineers.

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Answer 2

Natalie Anton

Iron oxides have different properties due to their chemical composition, which includes both iron and oxygen. The presence of oxygen in iron oxides contributes to their distinct characteristics compared to pure iron and steel. The bonding arrangement and crystal structure in iron oxides differ from metallic iron and steel, influencing properties such as color, hardness, and reactivity. Additionally, the oxidation state of iron in these compounds affects their magnetic behavior and electrical conductivity.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.