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Normal freezing point of benzene

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1) The boiling point of ethanol, CH3CH2OH is 78.50 °C at 1 atmosphere and its Kbp value is 1.22 °C/m. A nonvolatile, nonelectrolyte that dissolves in ethanol is testosterone . 

How many grams of testosterone, C19H28O2 (288.4 g/mol), must be dissolved in 285.0 grams of ethanol to raise the boiling point by 0.500 °C?

____________ g testosterone.

2) The normal freezing point of benzene, C6H6, is 5.50 °C and its Kfp value is 5.12 °C/m. A nonvolatile, nonelectrolyte that dissolves in benzene is estrogen (estradiol). 

If 11.53 grams of estrogen, C18H24O2 (272.4 g/mol), are dissolved in 198.1 grams of benzene:

The molality of the solution is ___________m.

The freezing point of the solution is _________ °C.

Reference no: EM131840668

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