When 1.623 x 10-2 mol of NH3 and 1.623 x 10-2 mol of O2 are introduced into a 2.035 L reaction vessel at a certain temperature a chemist finds that at equilibrium the N2 concentration is 2.147 x 10-3 M: 4NH3(g) + 3O2(g) <==> 2N2(g) + 6H2O (g) What is the value of Kc for this reaction ?

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