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What is the oxidation number of Mn in K(...

What is the oxidation number of Mn in `K_(2) MnO_(4)`?

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If the oxidation number of Mn in `K_(2)MnO_(4)` br x them `underset(("ForK"))(2(+1)+)underset(("ForO"))(x+4(-2))=0therefore x=+6`
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