1.
____Zn + ____Sn(NO3)2 →
2.
____Al + ____H2O →
3.
____HBr + ____Fe →
4.
____HI + ____Fe →
5.
____HCl + ____Na →
6.
____HCl + ____Al →
7.
____H2S + ____Mg →
8.
____H2SO4 + ____Al →
9.
____Cu + ____Hg(NO3)2 →
10.
____Cs + ____H2O →
11.
____HCl + ____Mg →
12.
____Mg + ____Hg(NO3)2 →
13.
____Mg + ____(CH3COO)2Pb →
14.
____HI + ____Zn →
15.
____Li + ____H2O →
16.
____Zn + ____CH3COOAg →
17.
____H2SO4 + ____Fe →
18.
____Zn + ____AgNO3 →
19.
____Zn + ____(CH3COO)2Cu →
20.
____MnO2 + ____Al →