A mixture of the three gases, oxygen, nitrogen and argon, is at a total pressure of 500 kPa. There is a total of 1.2 moles of gas in the mixture. If the oxygen gas alone occupied the entire volume of the mixture, it would exert a pressure of 150 kPa. At room conditions the amount of nitrogen gas in the mixture would occupy a volume of 5.76 dm³. What is the partial pressure of the argon gas in the mixture?
✓ Correct answer
C: 250 kPa
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