A metal exists as an oxide with the formula M0.96O. Metal M can exist as M+2 and M+3 in its oxide M0.96O. The percentage of M+3 in the oxide is nearly.
5%
9.6%
8.3%
4.6%
M100*0.96O100*1
M96O100
Let M+3 is x.
Balancing the charge
3*x + (96 - x)*2 = 100*2
3x + 192 -2x = 200
x = 8
%
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