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A bearthing mixture used by deep-sea divers contains helium, oxygen, and carbon dioxide. What is the partial pressure of oxygen at 1.2 atm if PHe = 0.98 atm and PCO2 = 0.04 atm?

a) 1.02 atm
b) 0.12 atm
c) 0.94 atm
d) 0.18 atm

  • chemistry -

    If you mean the total pressure is 1.2 atm, then PO2+PHe+PCO2=1.2atm

  • chemistry -

    PO2+PHe+PCO2=1.2atm solve for PO2
    PO2= 1.2atm-PHe-PCO2

    answer is d

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