\(K_C=16=\frac{(1+x)(1+x)}{(1-x)(1-x)}=\frac{(1+x)^2}{(1-x)^2} \quad \therefore 4=\frac{(1+x)}{(1-x)}\)
\(\therefore 4-4 x=1+x \quad \therefore x=0.6\)
\(| NO |=1+ x =1+0.6=1.6\)
$NO_{(g)} + \frac{1}{2}{O_2} \rightleftharpoons N{O_2}_{(g)}$
$2N{O_2}_{(g)} \rightleftharpoons 2NO_{(g)} + {O_2}_{(g)}$