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CAIE A-Level Chemistry AS 7.1.5 The Terms Mole Fraction and Partial Pressure Questions

Practise calculating mole fractions, total moles and partial pressures for gas mixtures and equilibria using CAIE 9701 AS questions.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • Calculate mole fractions and partial pressures for gases in a mixture or equilibrium system.

CAIE A-Level Chemistry AS 7.1.5 The Terms Mole Fraction and Partial Pressure Questions question 1

[Maximum number: 1]

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 5.76dm35.76 \mathrm{dm}^{3}. What is the partial pressure of the argon gas in the mixture?

A

150 kPa

B

200 kPa

C

250 kPa

D

300 kPa

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