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mol = massa/Mr
= 3,2 gram/128
= 0,025 mol
cari molalitas (pelarutnya benzena)
m = mol/massa benzena (kg)
= 0,025mol/0,05 kg
= 0,5 molal
cari delta Tf
delta Tf = m.kf
= 0,5 molal . 5,1
= 2,55 oC
Tf = 5,46 - 2,55 = 2,91 oC
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