I need to know the solubility of potassium chloride in g / 100 mL of H2O at 60.0 Celsius from both the experimental and official solubility curves; also calculate the percent difference between the two values

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.