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July 3, 2015

Homework Help: Chemistry

Posted by Kathy on Monday, September 5, 2011 at 3:36pm.

A mixture of He and CO2 in a flask at 45.0C exerts a pressure of 955 torr. All of the CO2 is removed and is found to weigh 0.879 g. The pressure drops to 555 torr after the removal of CO2. What is the mass of He?

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