Chapter 15.3, Problem 5PPA

Write K_P expressions for $\left(\text{a}\right)\text{2CO}\left(g\right)+{\text{O}}_{\text{2}}\left(g\right)\rightleftarrows {\text{2CO}}_{\text{2}}\left(g\right),\left(\text{b}\right){\text{CaCO}}_{\text{3}}\left(s\right)\rightleftarrows \text{CaO}\left(s\right)+{\text{CO}}_{\text{2}}\left(g\right),\text{and }\left(\text{c}\right)N_2\left(g\right)+{\text{3H}}_{\text{2}}\left(g\right)\rightleftarrows {\text{2NH}}_{\text{3}}\left(g\right)$.