3. Calculate the value of the equilibrium constant (Kc) for the reaction displayed if the following equilibrium concentration data were measured at 723.0 K: [N2(g)] = 2.936 mol/L, [H2(g)] = 2.933 mol/L, [NH3(g)] = 3.443 mol/L.
N2(g)+3H2(g) = 2NH3(g)
N2(g)+3H2(g) = 2NH3(g)