1.

Ions valency is 3 and oxygen valency is 2 so how can so it should be Fe2O3 than how it is Fe3O4

Answer»

Fe3O4 is a MOLECULE in which Fe shows both of its oxidation states
IRON has two oxidation states +2 and +3
so Fe3O4 is basically a combination of
FeO and Fe2O3
can be written as Fe0. Fe2O3
you SEE in FeO ( fe shows +2 VALENCY)
in Fe2O3 ( fe shows +3 valency)



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