Question

Хлор+водород
Хлор+цинк

Answer 1

Cl+H= ClH2
Cl+Zn= ZnCl2

Answer 2

1. Ca → CaO → Ca(OH)2 → CaCl2
1) 2Сa + O2 = 2CaO
2) CaO + H2O = Ca(OH)2
3) Ca(OH)2 + 2HCl = CaCl2 + 2H2O