Analysis shows that nickel oxide has the formula $Ni_{0.98}O_{1.00}$. What fractions of nickel exist as $Ni^{2+} $and $Ni^{3+}$?
What i did:
Let the number of $Ni^{2+}$ and $Ni^{3+}$ atoms be $x$ and $y$ respectively
one atom/ion of $Ni^{2+}$ satisfies one $O^{2-}$ atom
$2 \over 3$ atom/ion of $Ni^{3+}$ one $O^{2-}$ atom
and then i wrote down the equations: $x + $$3 \over 2 $$y =1$ and $x+y=0.98$
Then i solved the equations to get the answers:
$x=0.94 $ $and$ $y=0.04$
Is what i did correct? If not then guide me how to solve the question