Solving a problem in chemistry section 4 point 74

Solving a problem in chemistry section 4 point 74

74. What is the equilibrium constant of the reaction: 4HCl (g) + O2 (g) ↔ 2H2O (g) + 2Cl2 (g) if the equilibrium concentration (mol / dm 3) are: [Cl2] = 0,04; [H2O] = 0,20; [HCl] = 0,08; [O2] = 0,10?

Additional information:

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)