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October 25, 2014

Homework Help: chem - pressure

Posted by T on Wednesday, March 31, 2010 at 4:00am.

A closed vessel with volume of 226.9mL initially contained air at 680.8mmHg at 16.5 degrees celcius.
A sample of an organic liquid of mass 0.113g was injected into the flask which was then warmed to 124.9 degrees celcus causing all the organic liquid to vaporise. The final pressure inside the container was then 1268.7mmHg. (give answers to 1 decimal point):
a) air pressure inside at 124.9 degrees celcius? _____mmHg

b) pressure due to organic vapour at 124.9 degrees celcius? ____mmHg
c) Molar mass of organic compound? ____g mol^-1

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