Find the equilibrium law expression?

Question

Once you have balanced the following chemical equation, find the corresponding equilibrium law expression:

C₃H₈ (g) + O₂(g) <--> CO₂(g) + H₂O(g)

Answer 1

C₃H₈ (g) + 5O₂(g) <--> 3CO₂(g) + 4H₂O(g) ... balanced equation

Keq = [CO₂]³[H2O]⁴/[C₃H₈][O₂]⁵