Question

Помогите, пожалуйста ‘

Answer 1

1) $CaCl_{2} = Ca + Cl_{2}$

2) $Ca + H_{2} = CaH_{2}$

3) $CaH_{2} + 2H_{2}O = 2H_{2} + Ca(OH)_{2}$

4) $H_{2} + ZnO = Zn + H_{2}O$