Jawabanmu

2014-06-14T11:55:16+07:00
Tf = 0 - ∆Tf
-3,72°C = -∆Tf
3,72°C = ∆Tf

∆Tf = Kf x m
3,72 = 1,86 x  \frac{gram}{mr} x  \frac{1000}{gram pelarut}
3,72 = 1,86 x  \frac{9}{mr} x  \frac{1000}{25}
93 mr = 16740
mr = 180

C : H : O
 \frac{40}{12} :  \frac{6,6}{1} :  \frac{53,4}{16}
3,3 : 6,6 : 3,3                dibagi 3,3
1 : 2 : 1
   rumus empiris = CH₂O

RM = n(RE)
180 = n(mr CH₂O)
180 = n(30)
n = \frac{180}{30}
n = 6

RM = n(RE)
RM = 6(CH₂O)
Rumus Molekul = C₆H₁₂O₆






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