February 25, 2017

Homework Help: chemistry

Posted by molly on Saturday, May 4, 2013 at 7:39pm.

Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles) of He is present in a helium-oxygen mixture having a density of 0.528g/L at 25 degree celsius and 721 mmHg ?

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