Answer:
2Al+ 6HCl -->2AlCl3 + 3H2
2NaCl --> 2Na + 1Cl2
1Na2S + 2HCl --> 2NaCl + 1H2S
CH4 + 2O2 --> CO2 + 2H2O
2Na + 1Cl2 --> 2NaCl
2H2 + O2 --> 2H2O
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