A) 120
B) 60
C) 600
D) 180
Correct Answer: B
Solution :
Key Idea: \[m=\frac{100\times {{k}_{b}}\times w}{\Delta \,\,{{T}_{b}}\times W}\] Given \[{{k}_{b}}=5.2\] w = mass of solute = 6 g. W = mass of solvent = 100 g \[\Delta \,\,{{T}_{b}}=\] Elevation in boiling point \[={{0.52}^{o}}C\] m = molecular weight = ? \[\therefore \] \[m=\frac{100\times 5.2\times 6}{0.52\times 100}=60\]You need to login to perform this action.
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