20g of a polysaccharide is added to methanol (density of methanol is 792kg/m3 ) to form a solution. The mass of the prepared solution is 6.9kg. This solution at 298K is placed into cylindrical communicating vessels separated by a membrane transparent to methanol but not to the dissolved polysaccharide. The resulting equilibrated system is illustrated in Figure and subsequent table (where different dimensions denoted as dn represent respective diameters): Determine the molar mass of the dissolved polysaccharide, in g