1.
____Mg + ____Br2 →
2.
____H3PO4 + ____Mg →
3.
____Al + ____O2 →
4.
____Mg + ____Pb(NO3)2 →
5.
____HBr + ____Fe →
6.
____Cl2 + ____Li →
7.
____Mg + ____(CH3COO)2Cu →
8.
____Na + ____S →
9.
____Al + ____Cu(NO3)2 →
10.
____Cl2 + ____Al →
11.
____H3PO4 + ____Fe →
12.
____Hg + ____S →
13.
____Cl2 + ____Fe →
14.
____Cr2O3 + ____Al →
15.
____Ba + ____S →
16.
____Fe2O3 + ____Al →
17.
____Ba + ____Br2 →
18.
____Sr + ____S →
19.
____Cl2 + ____Zn →
20.
____Ba + ____O2 →