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【单选题】
某反应物起始浓度相等的二级反应, k = 0.1 dm 3 ·mol -1 ·s -1 , c 0 = 0.1 mol·dm -3 ,当反应速率降低为初始速率的 1/9 时所需时间为A.
200 s
B.
100 s
C.
30 s
D.
3.3 s
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