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Al +

HCl 🡪

AlCl3 +

H2

NaCl 🡪

Na +

Cl2

Na2S +

HCl 🡪

NaCl +

H2S

CH4 +

O2 🡪

CO2 +

H2O

Balanced equations:

2 Al + 6 HCl 🡪 2 AlCl3 + 3 H2

2 NaCl 🡪 2 Na + Cl2

2 Na2S + 2 HCl 🡪 2 NaCl + H2S

CH4 + 2 O2 🡪 CO2 + 2 H2O