Question

ПОМОГИТЕ СРОЧНО ДАМ 25 БАЛЛОВ​

Answer 1

1) $Cr + 2HCl = CrCl_{2} + H_{2}$

2) $4KMnO_{4} = 2K_{2}O + 4MnO + 5O_{2}$

3) $2H_{2} + O_{2} = 2H_{2}O$

4) $MgO + H_{2}O = Mg(OH)_{2}$

5) $K_{2}O + H_{2}O = 2KOH$