What would the final freezing point of water be if 3mol of sugar were added to 1kg of water?

When 3 moles of sugar (a non-volatile solute) are added to 1 kg of water, it will lower the freezing point due to freezing point depression. The freezing point depression can be calculated using the formula: ΔTf = i * Kf * m, where i is the van 't Hoff factor (which is 1 for sugar), Kf is the freezing point depression constant for water (approximately 1.86 °C kg/mol), and m is the molality. Here, the molality (m) is 3 mol/kg. Thus, ΔTf = 1 * 1.86 °C kg/mol * 3 mol/kg = 5.58 °C. This means the final freezing point of the solution would be approximately -5.58 °C.