The freezing temperature of water was measured as -3.52 °C when 64.8 g of saccorose was dissolved in 100g of water. a) the freezing point of water is the constant of descent? b) molecular weight of substance a since the freezing point is 8 °C when 32 g of substance a dissolves in 100 g of water?

A pharmacist mixes togehter 20 g of crystals of compound A and 10g of crystals of compound B. The mixture is then dissolved in 120mL of water to make cough syrup.

(Q73) A solution contains 16.90 grams of magnesium chloride and 815.7 grams of water. What is the vapor pressure (in torr) of this solution at 40.00°C? The vapor pressure of water at this temperature is 55.30 torr. You should use the experimental value of the van't Hoff factor for this calculation. (4 sf)

Ethylene glycol [CH2(OH)CH2(OH)]is a common automobile antifreeze. The freezing point and boiling point of a solution containing 293 g of ethylene glycol and 1085 g of water are ____and _____ respectively. (Kb and Kf for water are 0.52°C/m and 1.86°C/m, respectively) 8.09 to the power of o space end exponent C comma negative 102.3 to the power of o C negative 9.09 to the power of o space end exponent C comma 112.3 to the power of o C negative 6.09 to the power of o space end exponent C comma 108.3 to the power of o C negative 8.09 to the power of o space end exponent C comma 102.3 to the power of o C

How much sodium chloride would you need to add to 130 mL of water to make a solution that melts at -2.45 ∘∘C?

What will be the boiling point and freezing point of the solution when 258 g of sucrose (C12H22011) is dissolved in 855 mL of water? [Kb = 0.512 C/m, Kb = 1.86 C/m]

What is the freezing point, in °C, of a solution made with 1.56 mol of CHCI3 in 530.0 mL of solution? The solvent is CCI4 which has a Kf = 29.8 °C/M and a normal freezing point, Tf = -22.9 °C. Provide your answer to 1 decimal point.

What volume of water at 20.0 °C (d = 0.9982 g cm 3) is needed to dissolve 36.1 g of sucrose to make a 22.4 %(w/w) solution? Volume of water = i mL

(Q65) Calculate the vapor pressure (in torr) at 30°C of a solution containing 155.1 grams of the nonelectrolyte glucose (C6H1206) dissolved in 821.4 grams of water. The vapor pressure of pure water at this temperature is 31.80 torr. (4 sf)

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