Răspuns:
C2H6
M= (24gC +6gH)/mol=30g/mol
30g substanta........24gC ...........6gH
100g.........................x................................y
x= 80%C
y=20%H
mC:mH=24:6---->-nC:nH= 24/12 :6/1
=2: 6
= 1 :3
formula bruta: CH3
C3H7CL
M= (36gC +7gH +35,5gCl)/mol=78,5g/mol
78,5g substanta........36gC....7gH.....35,5gCl
100g...............................x...........y.............z
x=45,8%C
y= 8,9%H
z=45,2%Cl
nC :nH:nCl=36/12:7/1 :35,5/35,5
= 3 : 7 :1
formula bruta: C3H7Cl
Explicație:
