Yes, at least in minute quantity.
Only those coins made from iron or an iron alloy, and that are rusty.
a non-ferrous alloy is an alloy that does not contain iron.
No. By definition iron oxide is a compound of iron and oxygen.
Yes
Yes. Iron II oxide does not contain carbon, only iron and oxygen. Therefore it is inorganic.
The oxide Fe2O3 has: 70 % iron and 30 % oxygen.
Yes. Iron II oxide does not contain carbon, only iron and oxygen. Therefore it is inorganic.
Steel is an alloy because along with iron may contain many other alloying elements.
Ferrous alloys contain iron.
Rust is not a compound or an alloy. It is a chemical compound called iron oxide that forms when iron reacts with oxygen and water. Rust is a red or brownish flaky substance that forms on iron or steel surfaces when they are exposed to moisture or humidity over time.
Cerium oxide is non ferrous, as it does not contain any iron.
Iron oxide is not considered an organic molecule because it does not contain carbon-hydrogen bonds. Organic molecules are generally compounds that contain carbon atoms bonded to hydrogen atoms. Iron oxide is an inorganic compound composed of iron and oxygen atoms.