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1.
____Mg + ____Si →
2.
____Na + ____N2 →
3.
____Mg + ____S →
4.
____Al + ____Br2 →
5.
____Zn + ____O2 →
6.
____Na + ____O2 →
7.
____H2 + ____O2 →
8.
____Fe + ____S →
9.
____Ba + ____S →
10.
____Hg + ____S →
11.
____Na + ____F2 →
12.
____Na + ____Cl2 →
13.
____Zn + ____Br2 →
14.
____K + ____F2 →
15.
____O2 + ____P →