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Question - 1) An aqueous solution of an organic compound (d = 1.063 g/mL) has an osmotic pressure 12.16 atm at 25.0 degree C a freezing point of -1.03 degree C . What is its molar mass? (R= 0.082 Latm/molxK and Kf =1.86 degree C Kg/mol)

2) The vapor pressure of pure bromine is 44.0 mmHg at 4l.0 degree C. Bromine boils at 58.9 degree C, Calculate its heat of vaporization in kJ. R =8.314J/molxK.

3) What is the pH of 0.5% NaCN? (Ka HCN = 4.0x10^-10). Calculate % hydrolysis.

Illustrate all work utilize additional paper if required.

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