Exactly 10 Mol N₂O₄ Is Placed in an Empty 1

Exactly 1.0 mol N₂O₄ is placed in an empty 1.0-L container and is allowed to reach equilibrium described by the equation N₂O₄(g) 2NO₂(g) If at equilibrium the N₂O₄ is 37% dissociated,what is the value of the equilibrium constant,K_c,for the reaction under these conditions?

A) 1.2
B) 0.87
C) 1.20
D) 0.55
E) 0.22