Răspuns:
p=1 barr= 0,986atm
M,CH4=16g/mol
M,C2H6=30g/mol
pV=niuRT
pV= mRT/M
pM=roRT---> M,mediu= 1,036x0,082x300/0,986=>25,85g/mol
Mmediu= x1M,CH4 + x2MC2H6
x1+x2=1
x1= V,CH4/V,total x2=V,C2H6/Vtotal
25,85=x1x16+(1-x1)x30----> x1=0,30 x2=0,70
LA un amestec de 100volume, c=30% CH4 c= 70%C2H6
Explicație: