Determine the value of Kc for the following reaction, given the equilibrium concentrations: [N2]eq = 1.42 M, [H2]eq = 0.91 M, [NH3]eq = 3.35 M.
N2(g) + 3 H2(g) ⇌ 2 NH3(g)
a) 1.32
b) 2.79
c) 4.66
d) 0.89