The freezing point of pure water is 0°C and its molal freezing point depression constant (Kf) is 1.86°C/m.  a. What is the change in the freezing point (∆Tf) of a solution that contains 53 grams of sucrose (MW= 342.3 g/mol) dissolved in 1000 grams of water.

Use the graph to estimate the solubility of NANO3 in water at 40 °C. * Effect of temperature on solubility 160 KNO, 140 NANO, 120 100 KBr- 80 NH,CI 60 Na,So, 40 NaCI 20 10 20 30 40 50 60 70 80 90 Temperature (°C) 68 g/100 g H20 O 77 g/100 g H20 96 g/100 g H20 O no solubility Concentration (g/100 g H;0)

Please help with the following:

A certain organic compound O has a solubility in acetonitrile of 13.8 at 25. °C. Calculate the mass of O that's dissolved in L 650. mL of a saturated solution of O in acetonitrile at this temperature. Be sure your answer has the correct unit symbol and 3 significant digits. x10

1. Suppose that you add 27.5 g of an unknown molecular compound to 0.250 kg of benzene, which has a Kf of 5.12 oC/m. With the added solute, you find that there is a freezing point depression of 3.58 oC compared to pure benzene. What is the molar mass (in g/mol) of the unknown compound? 2. What is the freezing point (in degrees Celcius) of 3.70 kg of water if it contains 187.4 g of CaBr2? The freezing point depression constant for water is 1.86 oC/m and the molar mass of CaBr2 is 199.89 g/mol. 3. What mass, in grams, of NaCl needs to be added to 1.6 kg of water in order to create a solution with a freezing point of -5.6 °C? The freezing point depression constant of water is 1.86 ºC/m.

When 911. mg of a certain molecular compound X are dissolved in 35.0 g of benzene (C,H6), the freezing point of the solution is measured to be 2.5 °C. Calculate the molar mass of X. If you need any additional information on benzene, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to the correct number of significant digits. Ox10 미□

A solution is made by dissolving 6.60 grams of MgCl2 in 380.0 mL of water. What is the freezing point of this solution (in °C)? Express you answer to 3 significant digits.   Density of water 1.00 g/mL Kf of water 1.86oC/m

When 60.1 mg of a certain molecular compound X are dissolved in 70.0 g of benzene (CH), the freezing point of the solution is measured to be 5.4 °C. Calculate the molar mass of X. If you need any additional information on benzene, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to 1 significant digit. 0 ☐ X x10 Ś