2. The freezing point of compound A is -28oC and its Kf is 6.28. A solution of 25 g of compound B in 1000.g of compound A freezes at -12oC. Find the molecular weight of compound B.
22 g 5.02 g 9.81 g 12.6 g 14.4 g
3. A solution contains the same mass of two substances, substance A, which weights 200 g, and substance B, which weights 50 g. What is the mole fraction of substance A in this solution?
1/5 1/4 4/5 5/4 2/3
4. The scattering of light by particles is called:
chromatography colloidal suspension Tyndall effect separation colloidal suspension
5. The change in heat associated with the formation of a solution is called:
free energy of solution entropy of solution formation energy enthalpy of solution none of the above
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