1.
____H2SO4 + ____Al →
2.
____Cu + ____Hg(NO3)2 →
3.
____Fe2O3 + ____Fe →
4.
____Li + ____H2O →
5.
____HI + ____Zn →
6.
____Mg + ____Pb(NO3)2 →
7.
____HCl + ____Ca →
8.
____Al + ____Hg(NO3)2 →
9.
____Mg + ____(CH3COO)2Pb →
10.
____H2SO4 + ____Mg →
11.
____Zn + ____Cu(NO3)2 →
12.
____HCl + ____Na →
13.
____H3PO4 + ____Li →
14.
____Al + ____Cu(NO3)2 →
15.
____Mg + ____(CH3COO)2Cu →
16.
____MnO2 + ____Al →
17.
____Al + ____H2O →
18.
____Cs + ____H2O →
19.
____Zn + ____CuBr2 →
20.
____CuCl2 + ____Al →