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Air 56% = 56 gram
mol Urea = gr/Mr = 44/60 mol
molalitas urea
ΔTf=Kf.m
=1,86 x 13,095
=24,3567
Tf larutan urea
0-24,35 = -24,35°C
TIDAK DAPAT MENCAIRKAN salju karena titik beku UREA lebih tinnggi yaitu -24,35°C