To determine the solubility of ammonium chloride, we first find the curve for ammonium chloride in the chart for solubility measured in grams of solute per 100 mL of water solvent. Reading the chart at 60 degrees Celsius, approximately 55 grams of ammonium chloride will dissolve in 100 mL of water. Therefore, the solubility of ammonium chloride is 55 grams NH4Cl/100mL H2O at 60°C.