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If the quantity of oxygen occupying 2.76L container at a pressure of 0.825 atm and...

Chemistry
JAMB 2020

If the quantity of oxygen occupying 2.76L container at a pressure of 0.825 atm and 300k is reduced by one-half, what is the pressure exerted by the remaining gas?

  • A. 1.650atm
  • B. 0.825atm
  • C. 0.413atm
  • D. 0.275atm
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Correct Answer: Option A
Explanation

Using the combined gas law formula,

Given that P\(_1\) = 0.825,   V\(_1\) = 2.76 L, V\(_2\) = 1.38 L, P\(_2\) = ?

And T1 = T2; we would have P\(_2\) = [ P\(_1\) X V\(_1\) ] ÷ V\(_2\)

: [0.825 X 2.76]  ÷ 1.38

= 1.650atm

 

There is an explanation video available below.


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Explanation Video

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WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995