A compound contains 42.9% C, 2.4 % H,  16.6% N and 38.1% O. The addition of 3.16 g of this compound to 75.0             ml of cyclohexane (d=0.779g/ml) gives a solution with a freezing point  at 0.0oC.   Freezing point of cyclohexane           is  6.50oC  and kf = 20.2 oC/m.  Determine the molecular formula of this compound.

1-A sample of pure t-butyl alcohol weighing 6.22 g was found to have a freezing point of 24.7 °C. When 0.543 g of an unknown compound X was added to the t-butyl alcohol, the mixture had a freezing point of 21.3 °C. Calculate the molar mass of compound X. (Kf = 12.8 °C/molal for t-butyl alcohol.)A sample of pure t-butyl alcohol weighing 6.22 g was found to have a freezing point of 24.7 °C. When 0.543 g of an unknown compound X was added to the t-butyl alcohol, the mixture had a freezing point of 21.3 °C. Calculate the molar mass of compound X. (Kf = 12.8 °C/molal for t-butyl alcohol.)   2-What is the rate law expression for the reaction A + B → C, based on the following data

What is the freezing point (in K) of a solution made by dissolving 19.543g of CCl4 in 130.0 g of benzene? Pure benzene has a freezing point of 5.5°C and a Kf = 5.12 °C/m.

When 0.52 g of an unknown nonelectrolyte are dissolved in 35.0 g cyclohexane, the freezing point of the solution is 5.1ºC.  Pure cyclohexane freezes at 6.6ºC and has a Kf of 20.0ºC/m. What is the molar mass of the unknown in g/mol? Enter your answer with no decimal places (round to the nearest whole number). Do not include units. Do not worry about significant figures. Example: 2

8. * 00 #3 11 v 12 13 v 14 v 15 v 16 = 17 19 v 20 When 1.06 g of a certain molecular compound X are dissolved in 85.0 g of dibenzyl ether ((C,H,CH,),0), the freezing point of the solution is measured to be 0.9°C. Calculate the molar mass of X. If you need any additional information on dibenzyl ether, 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. Check Save For Later Submit Assignment O 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use I Privacy Center Accessibility EPIC MacBook Pro 888 F4 F8 & * $4 7. R. alt command option option command

Suppose that you add 22.6 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 3.30 oC compared to pure benzene.   What is the molar mass (in g/mol) of the unknown compound?

a) Calculate the freezing point of a solution containing 13.2 gg FeCl3FeCl3 in 156 gg water. b) Calculate the boiling point of the solution above. c) Calculate the freezing point of a solution containing 6.0 %% KClKCl by mass (in water). Express your answer using two significant figures.

A solution containing 3.00 g  of an unknown nonelectrolyte liquid and 8.80 g  water has a freezing point of −3.33 °C. The Kf = 1.86 °C/m for water. Calculate the molar mass of the unknown liquid in g/mol.

A) The vapor pressure of diethyl ether (ether) is 463.57 mm Hg at 25 °C. A nonvolatile, nonelectrolyte that dissolves in diethyl ether is DDT.Calculate the vapor pressure of the solution at 25 °C when 8.376 grams of DDT, C14H9Cl5 (354.5 g/mol), are dissolved in 227.7 grams of diethyl ether.diethyl ether = CH3CH2OCH2CH3 = 74.12 g/mol.VP(solution) =             mm Hg   B) The vapor pressure of water is 23.76 mm Hg at 25°C. How many grams of glucose, , a nonvolatile, nonelectrolyte (MW = 180.2 g/mol), must be added to 256.7 grams of water to reduce the vapor pressure to 23.49 mm Hg? water = H2O = 18.02 g/mol. Mass =  g

A solution is made by adding 2.190 mol of sucrose, a nonelectrolyte, to 430 g of water. Calculate the freezing point of this solution. The Kf for water is 1.86 oC/m.