WAEC Chemistry 2010 Objective — Question 24

Question 24 of 49 from the West African Examinations Council (WAEC) Chemistry 2010 Objective paper, with the correct answer and a full explanation.

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

A. A. 6 moles of neon
B. B. 3 moles of oxygen
C. C. 2 moles of chlorine
D. D. 1 mole of ethaneCorrect

Explanation

6 moles of neon contains 6 atoms of Ne. 3 moles of O2 contains 6 atoms of oxygen. 2 moles of Cl2 contains 4 atoms of chlorine. 1 mole of C2H6 contains 2 atoms of carbon and 6 atoms of hydrogen = 8 atoms total - the highest.

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