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Stoichiometry Mass–Volume Stoichiometry

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In the reaction: 2Na + 2H₂O → 2NaOH + H₂ what volume of H₂ at STP (273 K and 1 atm) is produced by 23 g Na?

Verified Answer & Explanation⌄

Correct Answer: A) 11.2 dm³

Concept Explanation

23 g Na = 1 mol Na. 2 mol Na produce 1 mol H₂. Therefore, 1 mol Na produces 0.5 mol H₂. Volume = 0.5 × 22.4 = 11.2 dm³.

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