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Stoichiometry Gas Density and Molar Mass

1

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Which gas has a mass of approximately 1.16 g per litre at STP (273 K and 1 atm)?

Verified Answer & Explanation⌄

Correct Answer: D) C₂H₂

Concept Explanation

Molar mass ≈ density × molar volume. M = 1.16 × 22.4 ≈ 26 g mol⁻¹. C₂H₂ has molar mass 26 g mol⁻¹.

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