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Calculate the molar mass of substance \mathrm{" X"}  when 5gYX is dissolved in  \mathrm{100 \mathrm{~g}}  of  \mathrm{\mathrm{CCl}_4} , it raised boiling point by \mathrm{0.90 \mathrm{~K}. \{ \mathrm{Kb}}  for \mathrm{ \mathrm{CCl}_4}  is  5.0 \mathrm{~K} \mathrm{~{kgmol}^{-1}}}

Option: 1

 21.87 


Option: 2

 30.26 


Option: 3

 28.49 


Option: 4

26.31


Answers (1)

best_answer

\mathrm{\Delta T b=K b \times \text { molatity } }
\mathrm{0.90=5 \times\left(\frac{5 / M}{100 / 100}\right) }
\mathrm{M=26.31 }.

Posted by

HARSH KANKARIA

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