Răspuns:
M,CH4=16g/mol
M,C2H6=30g/mol
m,amestec= 16+30=46g.
mC,ametsec=36g..........a-A
m,Hametsec=10g..........c-F
46g amestec.......36gC
100g....................x=78,26% b-A
46g amestec.....16gCH4........30gC2H6
100g............................x............................y
x=34,8%CH4
y=65,2%......d-F
Explicație: