CnH2n + HBr ----> CnH2n+1Br
14ng...................81g HBr
5,6g....................8,1g HbR
113,4n = 453,6 => n = 4
F.M => C4H8
H₃C-CH=CH-CH₃ + HBr --> H₃C-CH-CH₂-CH₃
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Br
H₃C-CH-CH₂-CH₃ + Na ---> H₃C-CH₂-CH₂-CH₃ + NaBr
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Br
izomerii posibili A : 1-butena, 2-butena, 2-cis si 2-trans butena, 2-metilpropena, ciclobutan, metilciclopropan
B:1-bromobutan, 2-bromobutan
C: n-butan, 2-metilpropan,