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The volume of 0.354g of helium at 273°C and 114cmhg of mercury pressure is 2667cm\(^3\)....

Physics
JAMB 2019

The volume of 0.354g of helium at 273°C and 114cmhg of mercury pressure is 2667cm\(^3\). Calculate the volume

  • A. 2000.25 cm\(^3\)
  • B. 200.025 cm\(^3\)
  • C. 4003.27 cm\(^3\)
  • D. 2010.25 cm\(^3\)
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Correct Answer: Option A
Explanation

m = 0.354g, T\(_1\) = 273°C = 273 + 273 = 576K
P\(_1\) = 114cmHg, V\(_1\) = 2667cm\(^3\) at STP
T\(^2\) = 273K, P\(_2\) = 76cmHg, V\(_2\) = ?

P\(^1\)V\(^1\)
T\(^1\)
= P\(^2\)V\(^2\)
T\(^1\)

 

V\(_2\) = 114 × 2667 × 273
76 × 576
= 2000.25cm\(^3\)

There is an explanation video available below.


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Explanation Video

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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 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
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 offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709