Объяснение:
Фотка....................
1) CaC2+2H2O=C2H2+Ca(OH)2
2)C2H2+H2=C2H4
3)C2H4+H2O=C2H5OH
4)C2H5OH+3O2=2CO2+3H2O
H3C–CH(–CH3)–CH(–Br)–CH(–CH3)–CH3
M(CxHy)= D(H2)*2=21*2=42
w(C)/M(C) : w(H)/M(H)= 85.7/12 : 14.3/1= 7.1:14.3 =1:2
CH2- простейшая формула. M(CH2)=14
K=M(CxHy)/M(CH2)=42/14=3
C3H6 - истинная формула.