Chemistry

Problem

The gas-phase reaction

4\text{NH}_3(g)+5\text{O}_2(g)\rightleftharpoons4\text{NO}(g)+6\text{H}_2\text{O}(g)

reaches equilibrium in a closed container. Which expression correctly represents

K_p

for this reaction? a)

K_p=\dfrac{(P_{\text{NH}_3})^4(P_{\text{O}_2})^5}{(P_{\text{NO}})^4(P_{\text{H}_2\text{O}})^6}

K_p=\dfrac{(P_{\text{NO}})^4(P_{\text{H}_2\text{O}})^6}{(P_{\text{NH}_3})^4(P_{\text{O}_2})^5}

K_p=\dfrac{(P_{\text{NO}})^4(P_{\text{H}_2\text{O}})^6}{(P_{\text{NH}_3})^4}

K_p=\dfrac{P_{\text{NO}}P_{\text{H}_2\text{O}}}{P_{\text{NH}_3}P_{\text{O}_2}}