1.

A solution containing 4.2 g of urea in 500 ml was found to be isotonic with a 5% ( wt./vol.)solution of an organic non-volatile solute. The molar mass of the solute is

Answer»

35.71
325.8
357.1
418.6

Solution :For ISOTONIC SOLUTIONS
`C_(1)=C_(2)`
`(4.2xx1000)/(60xx500)=(5xx1000)/(Mxx100)`
`:.M=(5xx500xx60)/(100xx4.2)`
`=357.1`


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