n1 moli alchena : CxH2x + H2 ⇒ CxH(2x+2)
n2 moli alcan : CxH(2x+2)
n1·M + n2(M+2) = 284
6 g ⇔ 3H2 ⇒ n1 = 3
(n1+n2) moli CxH(2x+2) +(3x+1)/2 O2 ⇒xCO2 + (x+1)H2O
nCO2 = (n1 + n2)·x = 448/22,4 = 20 moli n1 + n2 = 20/x
amestec final : m = (n1+ n2)(14x +2) = 284 + 6 = 290 g
20/x ·(14x+2) = 290 28x + 4 = 29x x = 4 ⇒alchena = C4H8; alcan=C4H10
n1 + n2 = 20/4 = 5 ⇒ n2 = 2 moli C4H10 (n1 = 3 moli C4H8)
% butena = 3·100/5 = 60% % butan = 200/5 = 40%