1.

The solution of 6.8 gram non-ionic substance in 100 ram water is freezed at - 0.93^(@)C. What is the molar mass of unknown substance ?(K_(f)=1.86)

Answer»

34
136
68
`13.6`

Solution :`M=(K_(F)xx W xx 1000)/(Delta T_(f)xx w_(A))=(1.86xx6.8xx1000)/(0.93xx100)`
= 136 gram/mole.


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