Help in chemistry please.
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Help in chemistry please.

[From: ] [author: ] [Date: 12-03-31] [Hit: ]
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equal volumes of nitrogen, oxygen and helium exert a pressure of 800 mm Hg. what is the partial pressure of oxygen?

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equal volume ===> equal pressures

800/3 mmHg = 267 mm Hg = 267 torr
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