We know that osmotic pressure, Î = CRT
Where C = concentration = molarity = ?
          R =
gas constant = 0.0821 L.atm / (mol-K)
          T =
Temperature = 298 K
          Π=
osmotic pressure = 34.2 atm
Plug the values we get C = Î / (RT)
                                   Â
= 34.2 / ( 0.0821 x 298)
                                   Â
= 1.39 M
Therefore the molarity of the solution is 1.39 M
