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1.22 g of benzoic acid is dissolved in 1...

1.22 g of benzoic acid is dissolved in 100 g of acetone and 100 g of acetone seperately. Boiling point of the solution in acetone increases by `0.17^(@)` C, while that of solution, in benzene increases by `0.13^(@)` C , `K_(b)` for acetone and benzene is 1.7 K kg `mol^(-1)` and 2.6 K kg `mol^(-1)`. Find molecular weight of benzoic acid in two cases. Hence, find their sum.

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