Molalitas larutan NaCl 10% masa dlm air adalah..

NaCl 10% massa
NaCl = 10 gram
air = 90 gram

molalitas = mol terlarut / massa pelarut
molalitas = 10/58,5 / 0,09
molalitas = 1,899m

massa NaCl= 10%x100gram/100%= 10 gram
n NaCl= 10/58= 0,17
M NaCl= n/V
            = 0,17/0,1= 1,7 M