ChemistryKinetic theory of matter and gas lawsWAEC
Which of these gases diffuses fastest at the same temperature? [H = 1, He = 4, N = 14, O = 16]
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Answer: D. helium
The lightest gas diffuses fastest: He (4) is lighter than NH₃ (17), N₂ (28) and O₂ (32).
An AdmitMe practice question, written for the WAEC syllabus. Not an official past question.