2.13

$K_c=\frac{\left[SO_3\right]^2}{\left[SO_2\right]^2\left[O_2\right]}=\left(\text{mol/dm}^3\right)^{-1}=dm^3\text{/}mol$

$K_c=\frac{\left[H_2\right]^3\left[CO\right]}{\left[CH_4\right]\left[H_2O\right]}=\left(mol/dm^3\right)^2=mol^2/dm^6$

$K_c=\frac{\left[HCOOCH_3\right]\left[H_2O\right]}{\left[HCOOH\right]\left[CH_3OH\right]}=ei\ yksikköä$

$K_c=\frac{\left[H_2O\right]^2\left[Cl_2\right]^2}{\left[HCl\right]^4\left[O_2\right]}=\left(mol/dm^3\right)^{-1}=dm^3/mol$