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A student ran the following reaction in the laboratory at 751 K: N2(g) + 3H2(g) 2NH3(g) When she introduced 3.88×10-2 moles of N2(g) and 6.25×10-2 moles of H2(g) into a 1.00 liter container, she found the equilibrium concentration of NH3(g) to be 8.71×10-4 M. Calculate the equilibrium constant, Kc, she obtained for this reaction.