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Red rust Iron(III) oxide, is written Fe2O3

Black rust, Iron(II) oxide, is FeO

A contributor, below, offers that rust can be hydrated with some number of waters,

ANS2:

the formula for rust is Fe2O3.xH2O

where x is a variable as we do not know that with what amount of water will iron react and will form rust

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Brant Lockman

Lvl 13
3y ago

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