【单选题】听力原文:M: Since it's the rush hour, let's take the subway. W: OK. It's not as direct as the bus, but it's faster, and there will be less chance of a traffic jam. Q: Why did the man and woman decide to t...
【单选题】已知 : Fe 3 + + e - == = Fe 2 + φ y = 0.77 V Cu 2 + + 2e - = == Cu j φ y = 0.34 V Fe 2 + + 2e - == = Fe φ y = - 0.44 V Al 3 + + 3e - == = Al j φ y = - 1.66 V 则最强的还原剂是 ( )
【单选题】听力原文:W: Since it's the rush hour, let's take the subway. M: Ok. It's not as direct as tile bus, but it's faster and there will be less chance of a traffic: jam. Q: Why do the man and woman decide to t...
【单选题】已知 φ y (Fe 3+ / Fe 2+ )=0.771V, φ y (Cu 2+ / Cu)=0.24V , 计算当 c (Fe 2+ )= c (Cu 2+ ) = 1.0 mol ·L -1 , Fe 3+ 的浓度至少大于( )时下列反应才能进行 : 2 Fe 3+ + Cu = 2 Fe 2+ + Cu 2+