4. Balance the following chemical equations:
(a) Zn + HCl -ZnCl2 + H2
(b) P4 + 04 - → P205
(C) FeCl2 + Cl2 - FeCl2,
(d) CO + 02 - CO2
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Answer:
1) Zn +2HCl - ZnCl2 + H2
2) 2P4 +5O4 - 4P2O5
3) 2FeCl2 + Cl2 - 2 FeCl3
4) 2CO + O2 - 2CO2
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