A:Cl2+2KBr═Br2+2KCl
B:2NaHCO3 △__ Na2CO3+H2O+CO2↑
C:4Fe(OH)2+O2+2H2O═4Fe(OH)3
D:2Na2O2+2CO2═2Na2CO3+O2↑
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—Must I finish the homework tonight? —No, you .You can finish it tomorrow.