sebanyak 20 gr zat A dilarutkan dalam 250 gr Air . membeku pada suhu -2,48°C tentukan mr zat A tsb Kf = 1,86

wt = 20 gr
wp = 250 gr
Tf = -2,48°C
Kf = 1,86
Mr = .........................?

ΔTf = wt/Mr x 1000/wp x Kf
2,48 = 20/Mr x 1000/250 x 1,86
2,48 = 148,8/Mr
Mr = 148,8/2,48
Mr = 60