The molecular mass of an organic acid was determined by the study of its barium salt. `4.290 g` of salt was quantitatively converted to free acid by the reaction with `21.64 mL` of `0.477 M H_(2)SO_(4)`. The barium salt was found to have two mole of water of hydration per `Ba^(2+)` ion and the acid is mono-basic. What is molecular weight of anhydrous acid?

Answer

`122.31`;