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September 2, 2014

Homework Help: chemistry

Posted by Elizabeth on Sunday, July 10, 2011 at 8:52pm.

a 500ml sample of oxygen gas at 24 degree celsius was prepared by decomposing a 3% aqueous soution of hydrogen peroxide in the presence of manganese catalyst by the reaction: 2h2o2 = 2 h20 + o2...
the oxygen was colletec by displacement of water. the total pressure of gas collected was 755 mmHG. THe vapoer of water at 24 dgree celsius is 23 mmHG.
A. What is the partial pressure of oxygen gas in the mixture?
b. How many moles of oxygen gas are in the mixture?

Please help? I'm not sure where to start!

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