The conductance of a 0.0015 M aqueous solution of a weak monobasic acid was determined by using a conductivity cell consisting of platinized Pt electrodes. The distance between the electrodes is 120 cm with an area of cross section of 1 cm2. The conductance of this solution was found to be 5×10−7 S. The pH of the solution is 4. The value of limiting molar conductivity Λmo of this weak monobasic acid in aqueous solution is Z×102 S cm−1 mol−1. The value of Z is