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Partial Pressure in Chemistry HELP! Please?

A heliox deep-sea diving mixture contains 2.0 g of oxygen to every 98.0 g of helium.

What is the partial pressure of oxygen when this mixture is delivered at a total pressure of 9.0 atm?

  1. Dr.A
    June 29th, 2011 at 08:01 | #1
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    Moles O2 = 2.0 / 32 = 0.0625
    moles He = 98.0 / 4 = 24.5

    total moles = 24.56

    partial pressure O2 / 9.0 = 0.0625 / 24.56

    partial pressure O2 = 0.0229 atm

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