Question

A sample of a metal oxide has formula $M _{0.83} O _{1.00}$ The metal $M$ can exist in two oxidation states $+2$ and $+3$ In the sample of $M _{0.83} O _{1.00}$, the percentage of metal ions existing in $+2$ oxidation state is___$\%$ (nearest integer)

Answer 1

2x+3(0.83−x)=2
x=0.49
%M2+=0.830.49​×100
=59%
So , the correct answer is 59.