question_answer

For the reaction equilibrium;\[{{N}_{2}}{{O}_{4}}(g)\rightleftarrows 2N{{O}_{2}}(g)\]; the concentration of \[{{N}_{2}}{{O}_{4}}\]and \[N{{O}_{2}}\]at equilibrium are \[4.8\times {{10}^{-2}}\]and \[1.2\times {{10}^{-2}}\]mol/L respectively. The value of \[{{K}_{C}}\] for the reaction is:

A) \[3\times {{10}^{-3}}M\]         

B) \[3\times {{10}^{3}}M\]

C) \[3.3\times {{10}^{2}}M\]                    

D) \[3\times {{10}^{-1}}M\]