阿摩線上測驗
28.What are the coefficients in front of 
and Cu(s) when the following redox equation is balanced in an acidic solution:
(A) 2, 3
(B) 2,6
(C) 3,4
(D) 3,6
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統計： A(9), B(0), C(0), D(1), E(0) #2740039
統計： A(9), B(0), C(0), D(1), E(0) #2740039