At 31.2°C (H₂0 density = 0.995g/cm²), dissolve 38.4 of a sodium diatrizoate in 1.60 X10¹ mL of water to make a 0.378m Solution. What is the molar mass of Sodium dia trizoate? At 31.2°C, If the vapor of water is 341 torr, what is the pressure pure vapor pressure of this solution?