题目内容

37.Therelatedinformationcanhelpyoutooperatethemachine(efficient).

查看答案

搜索结果不匹配？点我反馈

更多问题

38.Theprojectisstillunder(discuss),andpracticalsolutionsareexpectedtobefound.

39.Accordingtothereport,theNorthAmericanhealthmarket(grow)atarateofabout7.4%in2017.

已知(φ(Fe3+/Fe2+)= 0.77 V, φ(Sn4+/Sn2+)= 0.15 V)，Fe3+ 与 Sn2+反应的平衡常数对数值(lgK)为()

A. (0.77-0.15)/0.059
B. 2×(0.77-0.15)/0.059
C. 3×(0.77-0.15)/0.059
D. 2×(0.15-0.77)/0.059

用Ce4+滴定Fe2+，当体系电位为0.68V时,滴定分数为（）[φ¢ (Ce4+/Ce3+)=1.44V，φ¢ (Fe3+/Fe2+)=0.68V]

A. 0
B. 50%
C. 100%
D. 200%