Nitrogen has a Henry’s law constant of 6.0 x 10-4 mol/kg * bar  at 25 °C when dissolving in water. If the total pressure of gas ( N2 gas plus water vapor) over water is 1.00 bar, what is the concentration of N2  in the water in grams per milliliter? (The vapor pressure of water at 25 °C is 23.8 torr.)