18. S2O8 2- + 3I-(aq) → 2SO4 2- + I3-反應產生下面數據：此反應的速率定律(rate law)為：
(A) rate = k[S2O8 2- ][I -] 3
(B) rate = k[S2O8 2-] 2[I -] 2
(C) rate = k[S2O8 2-][I -]
(D) rate = k[S2O8 2-]

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統計： A(0), B(0), C(73), D(1), E(0) #1382107