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![[Post New]](/templates/default/images/icon_minipost_new.gif) 15 Apr 2008 12:38:11 IST
Accepted Answer [?]
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use it this way
depression in freezing point = kf * molality
so
1.5 = 3.9 * moles of solute (CHO) / kg of solvent ( here kg of solvent is 75/1000)
also moles of CHO = mass in grams / 29 (molecular wt of CHO = 29)
now just calculate
it comes out to be
0.836 grams of CHO
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