Nitrogen, hydrogen, and ammonia are in equilibrium in a 1000-L reactor at 550 K. The concentration of N₂ is 0.00485 M, H₂ is 0.022 M, and NH₃ is 0.0016 M. Th e volume of the container is halved, to 500 L.

(a) Calculate the equilibrium constant.

(b) Define y as the change in the concentration of nitrogen in the 500-L container. Is y positive or negative?

(c) Write the iCe table and express the equilibrium constant in a polynomial in terms of y.