Question

find the oxidation state of 3MnO4raise to the power -2​

Answer 1

Answer:

3x+(-2)4=-2

3x-8 = -2

3x=-2+8

3x= -6

x= -2

oxidation number of oxygen is -2

Answer 2

I think u mean Mn3O42-

I hope this helps (θ‿θ)