Chapter 15, Problem 44QP

The dissociation of molecular iodine into iodine atoms is represented as:

${\text{I}}_{\text{2}}\left(g\right)\rightleftarrows 2\text{I}\left(g\right)$

At 1000 K, the equilibrium constant K_c for the reaction is $3.80\times {10}^{-5}$. Suppose you start with 0.0456 mole of ${\text{I}}_{\text{2}}$ in a 2.30-L flask at 1000 K. What are the concentrations of the gases at equilibrium?