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The number of atoms present in 2.5moles of a triatomic gas is equivalent to   [1mole...

Chemistry
WAEC 2017

The number of atoms present in 2.5moles of a triatomic gas is equivalent to   [1mole = \(6.02\times 10^{23}\)]

  • A. \(2.5\times 10^{23}\)
  • B. \(1.5\times 10^{23}\)
  • C. \(1.5\times 10^{24}\)
  • D. \(2.5\times 10^{24}\)
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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Correct Answer: Option C
Explanation

1 mole = \(6.02 \times 10^{23}\)

2.5 moles = \(6.02 \times 10^{23} \times 2.5\)

= \(15.05 \times 10^{23} = 1.505 \times 10^{24}\)

\(\approxeq 1.5 \times 10^{24}\)


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