1) 4Li + O2=2Li2O
2Li+H2=2LiH
6Li+N2=2Li3N
2Li+ S=Li2S
2Li+Cl2=2LiCl
2Li+F2=2LiF
2Li+Br2=2LiBr
2Li+I2=2LiI
2) 2Zn+O2=2ZnO
Zn + S=ZnS
Zn+Cl2=ZnCl2
Zn+F2=ZnF2
Zn+Br2=ZnBr2
Zn+H2SO4=ZnSO4+H2
Zn+CuCl2=ZnCl2+Cu
3) 2Cu + O2=2CuO
Cu+ S=CuS
Cu+Cl2=CuCl2
Cu+Hg(NO3)2=Cu(NO3)2+Hg
M(CxHy)=1.863*29=54 г/моль
12x/54=0.889
x=0.889*54/12=4
y/54=0.111
y=0.111*54=6
C4H6