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Stoichiometry Mass–Mass Stoichiometry

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H₂ burns in chlorine according to: H₂ + Cl₂ → 2HCl What mass of Cl₂ is required to react completely with 4 g H₂?

Verified Answer & Explanation⌄

Correct Answer: C) 142 g

Concept Explanation

4 g H₂ = 2 mol H₂. The molar ratio H₂ : Cl₂ = 1 : 1. Therefore, Cl₂ required = 2 mol. Mass = 2 × 71 = 142 g.

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