(7分)
(1)2 clo 3-+so32-+2h+= 2 clo 2 =+so42-+H2O(2分)
(2)D?(1)
(3)4.816×10 23(或0.8N A)?(2分)
(4)Cl 2(克)+2O 2(克)=2ClO 2(克);△ h