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12 January, 12:53

A mixture of Ar, He, and O2 has a total pressure of 1,015 kPa. Argon exerts a partial pressure of 152 kPa and Helium exerts a partial pressure of 305 kPa. What is the partial pressure of oxygen in this mixture?

a. 1,472 kPa

b. 558 kPa

c. 863 kPa

d. 710 kPa

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Answers (1)
  1. 12 January, 13:14
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    This one is easy. It's just addition and subtraction. Add the partial pressure of Argon and the partial pressure of Helium:

    152 kPa

    +305 kPa

    457 kPa

    Next, subtract the result from the total pressure:

    1015 kPa

    - 457 kPa

    558 kPa
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