50. Solving a chemistry problem

34. From a volumetric flask with a capacity of 100 ml, 20 ml of a solution of acetic acid was taken for titration. In the process of conductometric titration of a sample with 0.1044 N sodium hydroxide solution, the following results were obtained
V, ml 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0
R, Ohm 205 1110 885 750 625 494 414 349 271 192 71 31
Determine the mass of dissolved acetic acid in the flask.