Answer: [tex][O_2]^3=[O_3]^2[/tex]
Explanation: Equilibrium constant is the ratio of the concentration of products to the concentration of reactants each term raised to its stochiometric coefficients.
For the given reaction:
[tex]3O_2(g)\rightleftharpoons 2O_3(g)[/tex]
[tex]K_{eq}=\frac{[O_3]^2}{[O_2]^3}[/tex]
Given :[tex]K_{eq}=1[/tex]
Thus [tex]1=\frac{[O_3]^2}{[O_2]^3}[/tex]
[tex][O_2]^3=[O_3]^2[/tex]