Question

решит хим. уравнения

Answer 1

2K+S→K2S  

4K+O2→2K2O

2K+Cl2→2KCl

2K+H2→2KH

Ca+S→CaS

2Ca+O2→2CaO

Ca+Cl2→CaCl2

Ca+H2→CaH2

2B+3S→B2S3

2B+3Cl2→2BCl3

2B+3H2→2H3B

4B+3O2→2B2O3