B
babyghetanh


Viết các pt sau
Na-> Na2O->NaOH->NaCl->NaOH->Cu(OH)2->CuO->Ca->CaCl2
Na->H2->Fe->Fe2O3->FeCl3->Fe(OH)3->Fe2O3->CO2
Na-> Na2O->NaOH->NaCl->NaOH->Cu(OH)2->CuO->Ca->CaCl2
Na->H2->Fe->Fe2O3->FeCl3->Fe(OH)3->Fe2O3->CO2
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