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-   -   Can someone explain some of these Chemistry problems for me? (vapor pressure)? (http://www.molecularstation.com/forum/chemistry-forum/66963-can-someone-explain-some-these-chemistry-problems-me-vapor-pressure.html)

ChemisttheMenace 06-17-2009 08:16 AM

Can someone explain some of these Chemistry problems for me? (vapor pressure)?
 
I just got the feedback for my quiz in Chemistry II and my professor corrected the answers but I haven't had time to ask what I did wrong. Can you help? Best answer goes to either best explanation or most answers explained. question 1: Calculate the pressure at which chloroform, CHCl_3_ will boil at 55 degrees Celsius. The vapor pressure of chloroform is 400 mmHg at 24.1 degrees Celsius, and the heat of vaporization is 30.1 kJ/mole.

question 2: Cesium, Cs, packs in a face-centered cubic structure in the solid state with a radius of 265 pm. What are the edge length and density of cesium?


question 3: Calculate the Molarity and molality of a solution that is prepared by dissolving 15.0 g of butane, C_4_ H_10_ , in 85.0 g of octane, C_8_ H_18_. The density of this solution is .68 g/mL.


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