WAEC Chemistry 2011 Objective — Question 20
Question 20 of 50 from the West African Examinations Council (WAEC) Chemistry 2011 Objective paper, with the correct answer and a full explanation.
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The number of atoms in one mole of a substance is equal to the
- A. A. mass number
- B. B. oxidation number
- C. C. atomic number
- D. D. Avogadro numberCorrect
Explanation
The number of particles (atoms, molecules or ions) in one mole of a substance equals the Avogadro number (6.02x10^23).
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