Which sample contains the same number of molecules as 16 g of O₂ (H = 1, C = 12, N = 14, O = 16)?
Correct answer A. 22 g of CO₂
Explanation
16 g of O₂ is 0.50 mol. 22 g of CO₂ is also 0.50 mol, while the other samples are 1 mol or 2 mol, so only CO₂ matches.
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