Consider the reaction \(\mathrm{A(g)} + 2\mathrm{B(g)} \rightleftharpoons 2\mathrm{C(g)}\). At equilibrium at 600 K, the concentrations are \([\mathrm{A}] = 2\ mol\,dm^{-3}\), \([\mathrm{B}] = 1\ mol\,dm^{-3}\) and \([\mathrm{C}] = 2\ mol\,dm^{-3}\). Calculate the equilibrium constant \(K_c\) at 600 K.

• A

  0.25

• B

  1

• C

  2

• D

  4