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What volume of alcohol will have same mass as 4.2m-3 of petrol? Density of alcohol...

Physics
JAMB 2013

What volume of alcohol will have same mass as 4.2m-3 of petrol?
Density of alcohol = 8.4 x 10^2 kgm-3, density of petrol =7.2x10^2 kgm-3

  • A. 0.8m3
  • B. 1.4m3
  • C. 3.6m3
  • D. 49.m3
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Correct Answer: Option C
Explanation

Mp = ep x Vp

Mp = 7.2 x 102 x 4.2 = 3024

VA = \(\frac{M}{e_A}\)

VA = \(\frac{3024}{8.4 \times 10^2}\)

VA = 3.6

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
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
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts