Density or vapour density of a gas from its molar mass

This type of question, asked 2 times: 22 Apr 2025 S1, 14 May 2026 S2. All 2 questions below, oldest first.

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Question 1
22 Apr 2025 S1
62 $O_{2}$
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Question 2
14 May 2026 S2
5 $Which of the following gases has the highest density under normal conditions?$
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