Helium atom is two times heavier than a hydrogen molecule. At 298 K, the average kinetic energy of a helium atom is | States of Matter and Gaseous State — Chem-Mantra | Chem-Mantra

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States of Matter and Gaseous StatemediumMCQ SINGLE

Question

Helium atom is two times heavier than a hydrogen molecule. At 298 K, the average kinetic energy of a helium atom is

Answer: B

💡 Solution & Explanation

Average KE per molecule depends strictly on absolute T, not mass. Therefore, correct answer is B.

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