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Question 1. The number of particles present in 1.00 liters of a 1.00 molal solution of LiF is _________________ (2.007 x 1023, 3.011 x 1023, 6.022 x 1023, 1.204 x 1024). 2. The male hormone testosterone contains 79.12% carbon, 9.79% hydrogen and 11.09% oxygen. A solution containing 0.363 g of the hormone dissolved in 5.00 gm of benzene (C6H6) freezes at 4.27oC. If the freezing point of pure benzene is 5.50 oC and the freezing point depression constant for benzene is 4.90 oC kg/mole, determine the molecular formula of testosterone. 3. A 0.15 g sample of a purified protein is dissolved in water to give 2.0 mL of solution. The osmotic pressure is found to 18.6 torr at 25oC. Determine the molar mass of the protein.

/in /by

Question

1.  The number of particles present in 1.00 liters of a 1.00 molal solution of LiF

is

            _________________ (2.007 x 1023, 3.011 x 1023, 6.022 x 1023, 1.204 x 1024).

2.  The male hormone testosterone contains 79.12% carbon, 9.79% hydrogen and 11.09% oxygen. A solution containing 0.363 g of the hormone dissolved in 5.00 gm of benzene (C6H6) freezes at 4.27oC.   If the freezing point of pure benzene is 5.50 oC and the freezing point depression constant for benzene is 4.90 oC kg/mole, determine the molecular formula of testosterone.

3. A 0.15 g sample of a purified protein is dissolved in water to give 2.0 mL of solution.   The osmotic pressure is found to 18.6 torr at 25oC.   Determine the molar mass of the protein.

 
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