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Stoichiometry Molar Mass from Gas Volume

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11.2 dm³ of a gas at STP (273 K and 1 atm) has a mass of 16 g. What is its molar mass?

Verified Answer & Explanation⌄

Correct Answer: C) 32 g mol⁻¹

Concept Explanation

11.2 dm³ at STP = 0.50 mol. Molar mass = 16/0.50 = 32 g mol⁻¹.

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