1. H2 + Cl2 -> 2HCL
2. 2H2 + O2 -> 2H2O
3. 2HCl + 2Na -> 2NaCl + H2
4. O2 + 2Na -> Na2O
czyli : A -> H2 B->O2 C->Cl2 D->Na E->Na2O
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1. H2 + Cl2 -> 2HCL
2. 2H2 + O2 -> 2H2O
3. 2HCl + 2Na -> 2NaCl + H2
4. O2 + 2Na -> Na2O
czyli : A -> H2 B->O2 C->Cl2 D->Na E->Na2O