Analysis shows that nickel oxide has the formula `Ni_(0.98)O_(1.00)`. What fractions of nickel exist as `Ni^(2+)andNi^(3+)` ions.

Explanation

`Ni_(0.98)O_(1.00)`
Let `Ni^(2+)` be a and `Ni^(3+)` be (1 - a), the average oxidation no. of Ni.
`axx2+(1-a)xx3=(2xx1.00)/(0.98),a=0.959`
`Ni^(2+)=0.959,Ni^(3+)=0.041`
The percentage of `Ni^(2+)` is 95.9% and that of `Ni^(3+)` is 4.1%