Question

Un litru dintr-un amestec de metan, etan şi propan, care se aflăin raport molar de 1:2:1 are masa egală cu: ?

Answer 1

  x            2x            x
CH₄       C₂H₆       C₃H₈

$V_{amestec}=1L \\ \\ n=\frac{V}{V_{M}}=\frac{1}{22.4}=0,044\ moli$

[tex]x+2x+x=0,44\ \ ;\ 4x=0,44\ \ ;\  x=0,11\ moli [/tex]

$m_{CH_4}=x*(12+4)=16x \\ m_{C2H_6}=2x*(24+6)=60x \\ m_{C_3H_8}=x*(36+8)=40x$
$m_{amestec}=16x+60x+44x=120x=120*0,011=1,23\ g$