WAEC Chemistry 2011 Objective — Question 19
Question 19 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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What is the amount of magnesium that would contain 1.20x10^24 particles? [Mg=24, Avogadro's constant=6.02x10^23]
- A. A. 0.5 moles
- B. B. 2.0 molesCorrect
- C. C. 12.0 moles
- D. D. 24.0 moles
Explanation
Mole = Number of particles / Avogadro number = 1.20x10^24 / 6.02x10^23 = 2.0 moles.
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