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

Chemistry
WAEC 2010

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

  • A. 6 moles of neon
  • B. 3 moles of oxygen
  • C. 2 moles of chlorine
  • D. 1 mole of ethane
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Correct Answer: Option D
Explanation

Count Atomicity for Each Gas

  • Neon (Ne): A noble gas, which is monoatomic (1 atom per molecule).
  • Oxygen (O\(_2\)): A diatomic gas (2 atoms per molecule).
  • Chlorine (Cl\(_2\)): A diatomic gas (2 atoms per molecule).
  • Ethane (C\(_2\)H\(_6\)): A polyatomic molecule containing 2 carbon atoms and 6 hydrogen atoms (8 atoms per molecule).
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