Question

18. What is rust ? Write its chemical formula.​

Answer 1

Answer:

A reddish brown substance that forms on the surface of the iron. Chemical formula-Fe2o3

Answer 2

Rust is an iron oxide, a usually red oxide formed by the redox reaction of iron and oxygen in the presence of water or air moisture. Several forms of rust are distinguishable both visually and by spectroscopy, and form under different circumstances.

The chemical formula of rust is

Iron+ Water+ Oxygen = Rust

4 Fe(s)+ 6H2O(1)+ 3 O2(g) = 4 Fe(OH) 3(s)

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