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Analyses shows that FeO has a non-stoich...

Analyses shows that FeO has a non-stoichiometric composition with formula `Fe_(0.95)O_(1.00)`. Give reason.

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Some `Fe^(2+)` ions are replaced by `Fe^(3+)` ions , `3 Fe^(2+) -=2Fe^(3+)` to maintain electrical neutrality .
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