1.
____H2SO4 + ____Al →
2.
____Ba + ____H2O →
3.
____Al + ____H2O →
4.
____Sr + ____H2O →
5.
____Fe + ____H2O →
6.
____HI + ____Zn →
7.
____HBr + ____Fe →
8.
____Zn + ____H2O →
9.
____H3PO4 + ____Mg →
10.
____H2 + ____FeO →
11.
____H2SO4 + ____Mg →
12.
____CH3COOH + ____Zn →
13.
____HI + ____Al →
14.
____HI + ____Fe →
15.
____H2SO4 + ____Fe →
16.
____H2 + ____Br2 →
17.
____K + ____H2O →
18.
____HCl + ____Ca →
19.
____HBr + ____Al →
20.
____H2 + ____Mg →
21.
____CH3COOH + ____Mg →
22.
____H2 + ____PbO2 →
23.
____H2 + ____Ba →
24.
____HBr + ____Zn →
25.
____H2 + ____PbO →