At a certain temperature and at infinite dilution, the equivalent conductances of sodium benzoate, hydrochloric acid and sodium chloride are 349 and 229  240, ${\mathrm{ohm}}^{-1}{\mathrm{cm}}^2{\text{ equiv}}^{-1}$ respectively. The equivalent conductance of benzoic acid in ${\mathrm{ohm}}^{-1}{\mathrm{cm}}^2{\text{ equiv }}^{-1}$ at the same conditions is