hitung kemolalan larutan HCL 15%, fraksi mol pelarut, dan zat yang terlarutnya (Mr HCL=36,46)

HCl 15% = HCl 15gr dalam 100 gr larutan.
gH2O = 100-15=85
nH2O=85/18=4.72
nHCl = 15/36.46 = 0.92
Xp = 4.72/(4.72+0.41)=4.72/5.13=0.92
Xt =0.41/5.13=0.079