39. When the following redox equation is balanced with smallest whole number coefficients, the coefficient for zinc will be___________.
Zn(s) + ReO₄^- (aq) → Re(s) + Zn²⁺(aq) (acidic solution)
(A) 1
(B) 2
(C) 4
(D) 7

(E) 8

題目解析這道題目要求我們將一個氧化還...