A 5.6 g sample of an unknown alkene reacts completely with 16 g of Bromine. Identify the alkene.
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Butene
-
Ethene
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Propene
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Pentene
📝 Detailed explanation
CₙH₂ₙ + Br₂ → CₙH₂ₙBr₂.
n(Br₂) = 16 / 160 = 0.1 mol.
M(alkene) = 5.6 / 0.1 = 56 g/mol.
14n = 56, so n = 4.
The alkene is Butene (C₄H₈).
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