Proszę o pomoc??????
![Proszę O Pomoc class=](https://pl-static.z-dn.net/files/d5b/9bd5e733bb641bb1d6fe3800d383fe82.jpg)
2H2+O2--->2H2O
H2+Cl2--->2HCl
2Al+3S--->Al2S3
C+2H2--->CH4
4K+O2--->2K2O
Ca+H2--->CaH2