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2014-09-27T11:03:50+03:00
Ro = masa molara/22,4 => masa molara = 1,25 * 22,4 = 28 g/mol
%C = masa carbon/masa hidrocarbura * 100 => masa C = 85,71*28/100=24 g
%H=masa hidrogen/masa hidrocarbura * 100 => masa H = 14,29*28/100 = 4 g 
24+4 = 28 => FM = C2H4 - etena
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