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How many moles of oxygen would contain 1.204 x 1024 molecules? [Avogadro's constant (NA) =...

Chemistry
WAEC 2016

How many moles of oxygen would contain 1.204 x 1024 molecules?
[Avogadro's constant (NA) = 6.02 x 1023]
  • A. 1
  • B. 2
  • C. 3
  • D. 4
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Correct Answer: Option B
Explanation
6.02 x 1023 molecules is 1mole
1.204 x 1024 molecules will be......

\(\frac{1.204 \times 10^24 \times 1}{6.02 \times 10^23}\)

\(\frac{1.204 \times 10}{6.02}\) = \(\frac{12.04}{6.02}\) = 2moles

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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
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WAEC offline past questions - with all answers and explanations in one app - Download for free
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
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts