Chapter 14, Problem 19PE

The decomposition of ${\text{N}}_{\text{2}}{\text{O}}_{\text{4}}\text{ at 25 °C}$,

${\text{N}}_{\text{2}}{\text{O}}_{\text{4}}\left(g\right)\rightleftharpoons 2{\text{NO}}_{\text{2}}\left(g\right)$

has $K_{\text{c}}=4.61\times {10}^{-3}.\text{ A 2}\text{.00 L}$ vessel contained 0.0466 mol ${\text{N}}_{\text{2}}{\text{O}}_{\text{4}}$ at equilibrium. What was the concentration of ${\text{NO}}_{\text{2}}$ in the vessel? (Hint: What was the concentration of ${\text{N}}_{\text{2}}{\text{O}}_{\text{4}}$ in the container at equilibrium?)