問題詳情
2. 軟錳礦(pyrolusite)是由 Mn 和 O 組成的化合物。如果軟錳礦的質量中 63%是來自於錳，下列哪一項是軟錳礦的實驗式？
(A) Mn2O
(B) MnO
(C) Mn2O3
(D) MnO2
(E) Mn2O5
(A) Mn2O
(B) MnO
(C) Mn2O3
(D) MnO2
(E) Mn2O5
參考答案
答案：D
難度：適中0.423077
統計：A(6),B(5),C(1),D(11),E(1)
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