Homework Help: Chemistry

Posted by Anonymous on Monday, June 14, 2010 at 1:48pm.

1. Mass of flask, boiling chips, foil cap and unknown after cooling reaction 83.350g

2.Mass of flask, boiling chips,and foil cap. 82.657

3. water bath temperature C is 95.0 C
4. Barometric pressure inches of Hg 30.09
5. Accepted molar mass of unknown is 86.2g/moles
6. Volume of flask is 270 mls

Problem

1. Calculate mass of unknown.
2. Express water bath temperature in Kelvin
3. Express barometric pressure in standard atmospheric pressure
4. Express volume of flask in cm3
5. Calculate density of vaporized unknown.
Answers so far

1. 0.697 g
2. 368.15 K
3. 764.286
4. 270 cm3
5. How can I determine the vaporized unknown?

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