A breathing mixture used by deep-sea divers contains helium, oxygen, and carbon dioxide. what is the partial pressure of oxygen at 101.4 kpa if phe = 82.5 kpa and pco2 = 0.4 kpa?

Pressure of the Mixture = 101.4 kpa
Pressure of the helium phe = 82.5 kpa
Pressure of CO2 pco2 = 0.4 kpa.
Partial pressure of oxygen = Pressure of the Mixutre - (Pressure of the
helium + Pressure of CO2)
Partial pressure of oxygen = 101.4 - 82.5 - 0.4
Partial pressure of oxygen = 18.5 kPa

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Tringa0 Tringa0 · Answer 2 · 2019-10-07T08:08:18+02:00

Answer:

18.5 kPa is the partial pressure of oxygen.

Explanation:

Total pressure of the gases = p = 101.4 kPa

Partial pressure of the helium gas = [tex]p_{He}=82.5 kPa[/tex]

Partial pressure of the carbon dioxide gas = [tex]p_{CO_2}=0.4 kPa[/tex]

Partial pressure of the oxygen gas = [tex]p_{O_2}=?[/tex]

Applying Dalton's law of partial pressure:

[tex]p=p_{He}+p_{CO_2}+p_{O_2}[/tex]

[tex] 101.4 kPa=82.5 kPa+0.4 kPa+p_{O_2}[/tex]

[tex]p_{O_2}=101.4 kPa-82.5 kPa-0.4 kPa=18.5 kPa[/tex]

18.5 kPa is the partial pressure of oxygen.