Consider the chemical reaction 2NH 3(g) N 2(g) + 3H 2(g). The equilibrium is to be established in a 1.0 L container at 1,000 K, where K c = 4.0 × 10 –2. Initially, 1,220 moles of NH 3(g) are present. Estimate the equilibrium concentration of N 2(g).