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

  • A 1 mole of butane
  • B 4 moles of chlorine
  • C 3 moles of ozone
  • D 7 moles of argon
jamb 2019chemistry

The correct answer is D. 7 moles of argon

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

Argon is a monoatomic noble gas with the least number of atoms.

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