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Homework #3

  • Page ID
    42482
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    Due on Feb 3 (Wed)

    Q1

    Ytterbium(atomic number = 70, molar mass = 173.05) has a fcc crystal structure and a density of 6.90 g/cm3. Determine the metallic radius of Ytterbium.

    Q2

    The aqueous solubility at 20°C of CO2 at 1 atm is equivalent to 878 mL CO2(g), measured at STP(1atm,0°C), per liter of water. What is the molarity of CO2 in water that is saturated with air at 1 atm and 20°C? Air contains 0.0397% CO2 by mol.

    Q3

    What are the partial and total vapor pressures of

    A solution is prepared by mixing 25.4 g benzene, \(C_6H_6\), and 32.3 g toluene, \(C_6H_5CH_3\), at 25°C. The vapor pressure of \(C_6H_6\) at 25°C is 95.1 mmHg; the vapor pressure of \(C_6H_5CH_3\) is 28.4 mmHg. Calculate the following quantities.

    1. Partial pressure of benzene above the solution
    2. Partial pressure of toluene above the solution
    3. Total pressure of the vapor above the solution
    4. The mole fraction of benzene in the vapor above the solution

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