A solution contains a mixture of two volatile substances A and B. The mole fraction of substance A is 0.39. At 32°C the vapor pressure of pure A is 98 mmHg and the vapor pressure of pure B is 144 mmHg. Part A What is the total vapor pressure of the solution at this temperature? O 94.4 mmHg O 242 mmHg O 126 mmHg O 116 mmHg

What is the mole fraction of solute in a 3.12 m aqueous solution? Xsolute = x10 TOOLS

A 188 mg sample of a nonelectrolyte isolated from throat lozenges is dissolved in enough water to make 10.0 ml of solution at 25 °C. The osmotic pressure of the resulting solution is 4.89 atm. Calculate the molar mass of the compound. O 7.89x103 g/mol O 940 g/mol O 94.0 g/mol O 9,52x103 g/mol

What is the solubility concentration (M) of nitrogen gas in 25 °C water and at a nitrogen pressure of 0.80 atm? The solubility of nitrogen gas in water at 25 °C and a nitrogen pressure of 1.0 atm is        120     0.0037     0.80     0.00086     0.00055

A solution is made by dissolving 41.3 g urea (CH4N20), a nonelectrolyte, in 275 g water. Calculate the vapor pressure of this solution at 25°C and 45°C. vapor pressure of water 25°C 23.8 torr 45°C 71.9 torr vapor pressure at 25°C = torr vapor pressure at 45°C = torr

Choose the aqueous solution below with the lowest freezing point. All solutions are made of nonvolatile solutes. 0.200 m C6H12O6 0.200 m Al2(SO4)3 0.200 m K3PO4 0.200 m Ca(ClO4)2 These all have the same freezing point

A salt solution has an osmotic pressure of 17.0 atmospheres at 17°C.  What is the freezing point of this solution? Freezing point = °C

Choose the aqueous solution that has the lowest melting point. There are all solutions of nonvolatile solutes.  A) 0.150 m CaCl2 B) 0.200 m C6H12O6 C) 0.125 m NaCl D) 0.100 m AlCl3 E) They all have the same melting point.

Order the following four aqueous solutions by their freezing point temperature. The concentrations are in molality. Assume complete dissociation of electrolytes. highest freezing point (highest temperature) 0.035 m sucrose, C6H12O6 1 2 3 0.010 m potassium bromide, KBr 4 0.010 m sodium carbonate, Na2CO3 0.015 m calcium chloride, CaCl2 lowest freezing point (lowest temperature)