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The partial pressure of oxygen in a sample of air is 452 mm Hg and...

Chemistry
JAMB 2000

The partial pressure of oxygen in a sample of air is 452 mm Hg and the total pressure is 780 mm Hg. What is the mole fraction of oxygen?

  • A. 0.203
  • B. 0.579
  • C. 2.030
  • D. 5.790
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Correct Answer: Option B
Explanation

Mole fraction = \(\frac{\text{Partial pressure of component}}{\text{Total pressure of compound}}\)

= \(\frac{452}{780}\)

= 0.579

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Project Topics and Materials, Post-UTME past questions - Download now or upload yours to get paid
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789
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NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789
Project Topics and Materials, Post-UTME past questions - Download now or upload yours to get paid
Join your school's WhatsApp group
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts