27)
or
10
1
0
1
 -  
 
p
p
p
= 
2
1
2
1
w  × 
 × w
M
M
(1 28)
Here w1 and w2 are the masses and M1 and M2 are the molar masses
of the solvent and solute respectively From this equation (1 28), knowing all other quantities, the molar
mass of solute (M2) can be calculated