A solution with 1.0 mol C2H5OH in 100g of solvent has the same molality as a solution with 1.0 mol NaCl in 100g of solvent.

Urea (molar mass: 60.056 g/mol) is a non-volatile solute with a solubility of 17.0 g per 100 mL of methanol at 20 ºC. The vapor pressure of pure methanol (molar mass: 32.042 g/mol; density: 0.792 g/mL) at 20 ºC is 95.7 torr. What is the vapor pressure of a saturated solution of urea in methanol at 20 ºC? Select one: a.5.00 torr b.9.83 torr c.85.9 torr d.55.6 torr

Calculate the molality of a solution containing 130.6 g of glycine  (NH2CH2COOH)  dissolved in  1.502 kg of H2O.      m

Calculate the molality of a solution that is prepared by mixing 25.5 mL of CH 3OH (d = 0.792 g/mL) and 387 mL of CH 3CH 2CH 2OH (d = 0.811 g/mL).

Determine the molality of a 6.930 wt % aqueous solution of LiCl.

The molality of an aqueous NaCl solution that freezes at -1° C is equal to the molality of another solution of NaCl that boils at 101° C.   true or false?

When 14.4 g14.4 g of an organic compound known to be 55.81% C55.81% C, 7.0% H7.0% H, and 37.17% O37.17% O by mass is dissolved in 825.8 g825.8 g of benzene, the freezing point is 4.80 ∘C4.80⁢ ∘C. The normal freezing point of benzene is 5.49 ∘C5.49⁢ ∘C. What is the molecular formula for the organic compound? Assume that the organic compound is a molecular solid and does not ionize in water. ?fKf values for various solvents are given in the colligative constants table. molecular formula: CHO

A solution made by dissolving 150.0 g of an unknown compound in 425.0 mL of benzene to make a solution which has a freezing point 18.6 °C lower than that of pure benzene. Kf for benzene is 5.12 °C/m and the density of benzene is 0.877 g/mL.     What was the molality of the solution?   How many moles of the unknown compound were dissolved in the solution?   What is the molar mass of the unknown compound?

The boiling point of 6.05 g of a pure solvent is measured to be 48.000 ºC. When 20.00 g of an unknown solute (assume the van 't Hoff factor = 1.0000 for the solute and Kb =  4.85 °C/m for the solvent) is added to the solvent the boiling point is measured to be 55.500  ºC .  What is the molality ( in m) of the solution?(give your answer to two decimal places)