A) 10
B) 10.1
C) 100
D) 1.01
Correct Answer: C
Solution :
Key Idea: Use the following formula to find molecular formula of solute. \[M=\frac{{{K}_{b}}\times w\times 1000}{\Delta {{T}_{b}}\times W}\] where M = molecular mass of solute w = weight of solute = 0.15 g W = weight of solvent = 15 g \[\Delta {{T}_{b}}=\] elevation in boiling point \[={{0.216}^{o}}C\] \[M=\frac{2.16\times 0.15\times 100}{0.216\times 15}\] = 100You need to login to perform this action.
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