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Which of the following gases contains the least number of atoms at s.t.p?

Which of the following gases contains the least number of atoms at s.t.p?
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
  • A 1 mole of butane
  • B 4 moles of chlorine
  • C 3 moles of ozone
  • D 7 moles of argon
Correct Answer: Option A
Explanation:
4 moles of chlorine gas = 4Cl\(_2\) = 8 atoms of chlorine
3 moles of ozone = 3O\(_3\) = 9 atoms of oxygen
1 mole of butane = C\(_4\)H\(_{10}\)
7 mole of argon = 7Ar = 7 atoms of argon
Butane has the least number of atoms.

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