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1) The freezing point of a solution that contains {X} g of an unknown compound, (A),
dissolved in {Y} g of benzene is found to be {Z} °C. The freezing point of pure benzene is
5.48 °C. The freezing point depression constant of benzene is 5.12 °C/molal. What is the
molecular weight of the unknown compound?
2) A sample of water contains {A} grams of a protein in {B} mL of water. If the solution
has an Osmotic Pressure of {C} torr at {D} Celsius, what is the molecular weight of the
protein. Please use 0.08206 L atm / (mol K) and 273.15 as the conversion factor for T.
Please watch units.
Report your answer as a whole number in grams / mole, inputting only the number.
3) What is the molecular weight of the monomer ({A} unit of monomer) of polyvinyl
chloride? Dimer and Oligomer
Please use the following molecular weights and report your answer to two decimal
places
C = 12.01 / H = 1.008 / Cl = 35.45

Sagot :

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