The difference between the boiling point...

The difference between the boiling point and freezing point of an aqueous solution containing sucrose (mol. Wt. = 342 g` mol^(-1)`) in 100 g of water is `105.0^@C`. If `K_f and k_b` of water are 1.86 and 0.51 K kg `mol^(-1)` respectively, the weight of sucrose in the solution is about :

34.2 g

342 g

7.2 g

72g

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