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September 1, 2015

Homework Help: Chemistry

Posted by Ayesha on Sunday, October 7, 2012 at 6:09pm.

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 is present in a helium-oxygen mixture having a density of 0.498 at 25 and 721 ?

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