Chapter 13, Problem 83E

One of the important reactions in the formation of smog is represented by the equation

${\text{O}}_3\left(g\right)+\text{NO}\left(g\right)\rightleftharpoons {\text{NO}}_2\left(g\right)+{\text{O}}_2\left(g\right)$ $K_p=6.0\times {10}^{34}$

What is the pressure of O₃ remaining after a mixture of O₃ with a pressure of $1.2\times {10}^{-8}$ arm and NO with a pressure of $1.2\times {10}^{-8}$ atm comes to equilibrium? (Hint: K_P is large; assume the reaction goes to completion then comes back to equilibrium.)