80 grams of solute ( molar mass = 160 g ) is dissolved in 100 ml solution of density 1.8 g/ml. Molality of the solution is

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2.77 m

9 m

5 m

3.42 m

answer is C.

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Detailed Solution

Molality(m) =nsolute×1000Wsolvent; Molality(m) =80160×1000180-80; Molality(m) =5 m ;

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