Question

what is the formula of rust​

Answer 1

Explanation:

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Fe2O3

The chemical formula for rust is Fe2O3. Rust is formed when iron reacts with oxygen in moist air. The following chemical equation represents the reaction: 4Fe + 3O2 → 2Fe2O3. Water is necessary for the oxidation reaction to occur and to facilitate transport of the electrons.

Answer 2

Answer:

4Fe(OH)3(s)

Explanation:

The chemical equation for the formation of rust is:

Iron + Water + Oxygen = Rust

i.e. 4 Fe(s) + 6 H2O(l) + 3 O2(g) → 4 Fe(OH)3(s)