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Stoichiometry Gas Density and Molar Mass

1

Choose the best answer

A gas has a density of 2.0 g L⁻¹ at STP (273 K and 1 atm). The gas is most likely:

Verified Answer & Explanation⌄

Correct Answer: C) CO₂

Concept Explanation

At STP: Molar mass ≈ density × 22.4 = 2.0 × 22.4 = 44.8 g mol⁻¹. This is closest to CO₂, whose molar mass is 44 g mol⁻¹.

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