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A mixture of Ar, He, and O₂ has a total pressure of 1,015 kPa, with partial pressures of argon and helium being 152 kPa and 305 kPa, respectively. What is the partial pressure of oxygen in this mixture?

A. 558 kPa
B. 710 kPa
C. 863 kPa
D. 1,472 kPa

Answer :

Final answer:

The partial pressure of Oxygen (O₂) in a mixture with total pressure of 1,015 kPa, and known partial pressures of Argon (152 kPa) and Helium (305 kPa), can be calculated as 558 kPa (Option A).

Explanation:

The partial pressure of a specific gas in a mixture can be determined by subtracting the known pressures from the total pressure of the mixture. In this case, the total pressure of the mixture is given as 1,015 kPa. The partial pressure of Argon (Ar) is mentioned as 152 kPa, and that of Helium (He) is given as 305 kPa. So, to determine the partial pressure of Oxygen (O₂), you would subtract the partial pressures of Ar and He from the total pressure:

1,015 kPa - 152 kPa - 305 kPa = 558 kPa

Therefore, the partial pressure of Oxygen (O₂) in this scenario is 558 kPa, so your response should be 558 kPa, which corresponds with Option A

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