Question #f98b4

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1 Answer
Dr. Hayek
Oct 6, 2015

+7

Explanation:

The oxidation number for oxygen is always -2−2 except in hydrogen peroxide it is -1−1 and OF_2OF2 it is +2.

Having said that, the oxidation number of Mn in MnO_4^_MnO_4 is +7. It is calculated as follows:
x+4xx(-2)=-1=>x=+7x+4×(−2)=−1⇒x=+7

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