The solubility of Ar in water at 25 °C is 1.6 ⋅ 10-3 M when the pressure of the Ar above the solution is 1.0 atm. The solubility of Ar at a pressure of 2.5 atm is ________ M. The solubility of Ar in water at 25 °C is 1.6 10-3 M when the pressure of the Ar above the solution is 1.0 atm. The solubility of Ar at a pressure of 2.5 atm is ________ M. 1.6 ⋅ 10-3 1.6 ⋅ 103 4.0 ⋅ 10-3 6.4 ⋅ 10-4 7.5 ⋅ 10-2