chemistry

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Oxygen gas is collected over water at a temperature of 20c. If the totalmpressure of the system is 755mm, what is the pressure of the dry O2 gas?

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    vapor pressure H2O @ 20 C = ?. Look this up in tables in your text or notes. Call that pH2O
    Then Ptotal = pH2O + pO2.
    You know Ptotal and pH2O, solve for pO2.

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