[Steve]

How does the Equilibrium constant remain the same when the pressure of a system is increased. Due to Le Chatelier's principle this means that more ammonia is produced which would result in the hydrogen and nitrogen decreasing in concentration. If the ammonia's concentration has gotten bigger and the hydrogen and nitrogen's concentrations have decreased how does the equilibrium constant stay the same.

[curiouscat]

There's a compensating P that does not cancel out in reactions where moles change.