Chapter 15.2, Problem 1CP

Select the correct equilibrium expression for the reaction

$\text{2CO(}g{\text{)+O}}_{\text{2}}\text{(}g\text{)}\underset{}{\rightleftarrows }{\text{2CO}}_{\text{2}}\text{(}g\text{)}$

$\begin{array}{l}\text{a) }Kc\text{ =}\frac{\text{2}{\left[\text{CO2}\right]}^{\text{2}}}{\text{2}{\left[\text{CO}\right]}^{\text{2}}\left[{\text{O}}_{\text{2}}\right]}\\ \text{b) }Kc\text{ = }\frac{2\left[{\text{CO}}_{\text{2}}\right]}{\left(\text{2}{\left[\text{CO}\right]}^{\text{2}}\left[{\text{O}}_{\text{2}}\right]\right)}\\ \text{c) }Kc\text{ =}\frac{\text{2}{\left[\text{CO2}\right]}^{\text{2}}}{\text{2}\left[\text{CO}\right]\left[{\text{O}}_{\text{2}}\right]}\\ \text{d) }Kc\text{ =}\frac{\text{2}{\left[{\text{CO}}_{\text{2}}\right]}^{\text{2}}}{{\left[\text{2CO}\right]}^{\text{2}}\left[{\text{O}}_{\text{2}}\right]}\\ \text{e) }Kc\text{ =}\frac{{\left[{\text{CO}}_{\text{2}}\right]}^{\text{2}}}{{\left[\text{CO}\right]}^{\text{2}}\left[{\text{O}}_{\text{2}}\right]}\\ \end{array}$