1.

What is the molality of ethyl alcohol (molar mass = 46) in aqueous solution which freezes at -10^(@)C: K_(f)for water = 1.86 K "molality"^(-1)

Answer»

`3.540`
4.567
5.376
6.315

Solution :`DELTA T_(F) = K_(f) XX m,`
`:.10 = 1.86 xx m ` or ` m=5.376`


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