1.
____Mg + ____Sn(NO3)2 →
2.
____KO2 + ____K →
3.
____Cu + ____Hg(NO3)2 →
4.
____H2SO4 + ____Al →
5.
____Zn + ____CuSO4 →
6.
____Zn + ____(CH3COO)2Pb →
7.
____HI + ____Al →
8.
____Ca + ____H2O →
9.
____Li + ____H2O →
10.
____Mg + ____Cu(NO3)2 →
11.
____Zn + ____Cu(NO3)2 →
12.
____H3PO4 + ____Mg →
13.
____Mg + ____CuBr2 →
14.
____Al + ____H2O →
15.
____B2O3 + ____Mg →
16.
____Zn + ____CuBr2 →
17.
____CO + ____Fe →
18.
____H2S + ____Mg →
19.
____H3PO4 + ____Fe →
20.
____H2SO4 + ____Zn →
21.
____Mg + ____(CH3COO)2Cu →
22.
____Zn + ____Sn(NO3)2 →
23.
____HI + ____Fe →
24.
____Zn + ____Hg(NO3)2 →
25.
____Al + ____CuSO4 →