Chapter 15, Problem 53E

Consider the reaction.

$\text{2}{\text{H}}_2\text{S}(g)\rightleftharpoons 2{\text{H}}_{\text{2}}(g)+{\text{S}}_{\text{2}}(g)$

An equilibrium mixture of this reaction at a certain temperature has $\left[{\text{H}}_{\text{2}}\text{S}\right]=0.562\text{M}$, $\left[{\text{H}}_{\text{2}}\right]=2.74\times {10}^{-2}\text{M}$, and $\left[{\text{S}}_2\right]=7.54\times {10}^{-3}\text{M}$. What is the value of the equilibrium constant at this temperature?