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Posted by on Sunday, October 23, 2011 at 5:52pm.

A 260-mL flask contains pure helium at a pressure of 743 torr. A second flask with a volume of 480 mL contains pure argon at a pressure of 715 torr.

If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of helium? in torr

If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of argon? in torr

If the two flasks are connected through a stopcock and the stopcock is opened, what is the total pressure? in torr

  • chemistry 105 - , Sunday, October 23, 2011 at 6:07pm

    I assume they are both at the same temperature initially.

    Parial pressure is dependent on mole ratio. n=PV/RT in each flask, find n for each first.
    Then ADD the n for each. That is the N for the combined.
    PV=NRT now solve for P for the combined gases.

    Parg+Phelium= P
    Parg=narg/N * P
    Phelium= nhelium/N* P

  • chemistry 105 - , Friday, October 16, 2015 at 6:45am

    752 torr of He
    582 torr of Ar
    total=1334 torr

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