Answer:
[tex]\large\boxed{\large\boxed{2.0\times 10^{-50}M^-1}}}[/tex]
Explanation:
The reaction is:
[tex]3O_2(g)\rightleftharpoons 2O_3(g)[/tex]
The equlibrium constant equation is:
[tex]K_c=\dfrac{[O_3g)]^2}{[O_2(g)]^3}[/tex]
Substitute:
[tex]K_c=\dfrac{(2.86\times 10^{-28}M)^2}{(1.6\times 10^{-2}M)^3}=2.0\times 10^{-50}M^{-1}[/tex]