WAEC Chemistry 2018 Objective — Question 32
Question 32 of 50 from the West African Examinations Council (WAEC) Chemistry 2018 Objective paper, with the correct answer and a full explanation.
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How many atoms are contained in 0.2 moles of nitrogen? [N_A=6.02×10²³]
- A. 1.20×10²³
- B. 2.41×10²³Correct
- C. 3.62×10²³
- D. 4.82×10²³
Explanation
1 mole of N₂ contains 2 moles of N atoms. 0.2mol N₂ → 0.4mol N atoms. Number = 0.4×6.02×10²³ = 2.41×10²³.
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