已知 25 °C 时, E θ (Fe 3+ | Fe 2+ ) = 0.77 V , E θ (Sn 4+ | Sn 2+ ) =0.15 V 。今有一电池,其电池反应为 2 Fe 3+ + Sn 2+ === Sn 4+ +2 Fe 2+ ,则该电池的标准电动势 E θ (298 K) 为:( ) (5.0分) A. 1.39 V B. 0.62 V C. 0.92 V D. 1.07 V
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举一反三
【单选题】The ruling class had long been ________ to the suffering of the peasants, which led to the revolution.
【单选题】The new ruling class had built a cultural barrier against him by building their French against his own language.
A.
The new ruling class used their French to against his language, thus they build a cultural barrier.
B.
The new ruling class used French to fight against Saxon peasants'English, thus it made it difficult for the peasants to accept the language and the culture of the rulers.
C.
The new ruling class used French to fight against Saxon peasants'English, thus it made it difficult for the French to accept the language and the culture of the rulers.