[sector9tahiti]

A biochemical engineer isolates a bacterial gene fragment and dissolves a 10.5 mg sample of the material in enough water to make 31.3 mL of solution. The osmotic pressure of the solution is 0.340 torr at 25°C.
The molar mass is 18400 g/mol
If the solution density is 0.997 g/mL, how large is the freezing point depression for this solution (Kf of water=1.86°C/m)?

[Borek]

Show some effort.

[eunChae]

osmotic pressure :
   pi = M*R*T (molarity*gas constant* temperature in Kelvin)

freezing point deppression :
  (delta)T = -Kf * m (freezing p.dep. constant * molality)

these would be enough i guess...