The reaction between hydrogen and iodine at 700K is described by the equilibrium

In a certain experiment at 700 K, the various concentrations at equilibrium were found to be

[H₂] = 1.84 x 10^-3 mol.dm^-3
[I₂] = 3.13 x 10^-3 mol.dm^-3
[HI] = 17.7 x 10^-3 mol.dm^-3

Calculate K_c for this equilibrium at 700K.

Solution: Apply the appropriate equation for the equilibrium constant