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December 19, 2014

Homework Help: chemistry

Posted by Gweedo on Wednesday, June 17, 2009 at 4:31pm.

Here is the question:

A sample of an unknown volatile liquid was injected into a Dumas flask (mflask=27.0928g. Vflask=.104L) and heated until no visible traces of the liquid could be found. The flask and its contents were then rapidly cooled and reweighed (mflask+vapor=27.4593g) The atmospheric pressure and temperature during the experiment were 0.976 atm and 18.0 C, respectively. The unknown volatile liquid's molecular mass was __________.

I have not got any concrete homework done on this outside of guessing and checking can someone set up this equation for me or explain how this can be done?

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