Ответ:
4B + 3O2 → 2B2O3
4K + O2 → 2K2O
2Pb + O2 → 2PbO
2Fe + O2 → 2FeO
4Li + O2 → 2Li2O
4Fe + 3O2 → 2Fe2O3
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Verified answer
Ответ:
4B + 3O2 → 2B2O3
4K + O2 → 2K2O
2Pb + O2 → 2PbO
2Fe + O2 → 2FeO
4Li + O2 → 2Li2O
4Fe + 3O2 → 2Fe2O3