Chapter 12, Problem 15Q

Consider the following reaction at some temperature:

${\text{H}}_{\text{2}}\text{O}\left(g\right)+\text{CO}\left(g\right)\rightleftharpoons {\text{H}}_2\left(g\right)+{\text{CO}}_2\left(g\right)K=2.0$

Some molecules of H₂O and CO are placed in a 1.0-L container as shown below.

When equilibrium is reached, bow many molecules of H₂O, CO, H₂, and CO₂ are present? Do this problem by trial and error-that is, if two molecules of CO react, is this equilibrium; if three molecules of CO react, is this equilibrium; and so on.