1. What is a colligative property?2. Give the equation for freezing point depression and indicate the units for each term in the expression.3. A measurement of the freezing temperature of a solution allows you to calculate the concentration of the solution. What else do you need to measure to determine the molar mass of the solid added to the solvent?4. A student adds 1.504 g of a solid to 25.0 mL of water. The freezing temperature is measured to be -1.20°C. What is the molality of the solution?5. What is the molar mass of the solid above?