CO2
(CO2)=16*2+12=32+12=44
W(C)=(12:44)*100\%=27,2 \%
W(O)=(32:44)*100\%=72,8 \%
(CaS)=40+32=72
W(Ca)=(40:72)*100\%=55,6 \%
W(S)=(32:72)*100\%=44,4 \%
N(CO2)=4.4/44=0.1моль
n(C)=n(CO2)=0.1моль
n(H2O)=0.9/18=0.05
2n(H)=n(H2O)=2*0.05=0.1моль
C:H=0.1/0.1:0.1/0.1=1:1
Mr(C:H)=2.786*28=78
CnH2n-6=78
12n+2n-6=78
14n=78+6
n=84/14
n=6
C6H6-это бензол