A) 120
B) 60
C) 600
D) 180
Correct Answer: B
Solution :
Key Idea.\[m=\frac{100\times {{k}_{b}}\times w}{\Delta {{\Tau }_{b}}\times W}\] Given \[{{k}_{b}}=5.2\] \[w=\]mass of solute \[=6\text{ }g\] \[W=\]mass of solvent \[=100\text{ }g\] \[\Delta {{\Tau }_{b}}=\]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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