Alkeni

Submitted by marinar on Sat, 10/11/2014 - 22:12
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Napisi formulu alkena ako 0,35g ovog alkena adira 0,8 g broma

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milicaradenkovic - Sun, 10/12/2014 - 08:27

CnH2n+Br2--------------->CnH2nBr2

n(Br2)=m/Mr=0.8/160=0.005 mol

n(CnH2n)=n(Br2)=0.005 mol

Mr=m/n(CnH2n)=0.35/0.005=70 g/mol

Mr=n*Ar(C)+2*n*Ar(H)

70=12*n+2*n

70=14*n

n=70/14=5 i to je C5H10