# Please,why is MnO2-4 i.e manganese(vi)oxide not MnO3?...i still dont get it..i mean if u calculate the oxidation number with the latter it'll still be +6

##### 1 Answer

Jun 24, 2018

The formula for manganese(VI) oxide is

#### Explanation:

I'm not sure if I understand the question completely, but I'll verify the oxidation number and formula for

We know that the oxidation number for O is -2

Let's set the oxidation number for Mn as x

Manganese(VI) oxide is indeed

Oxidation number for Mn in **+6**

Manganese(IV) oxide, on the other hand is

Oxidation number for Mn in **+4**