【简答题】298K 时,已知 E y ( Fe 3+ /Fe 2+ )=0.771V , E y ( Sn 4+ /Sn 2+ )
=0. 15V ,则反应 2Fe 2+ + Sn 4+ ===
2Fe 3+ + Sn 2+ 的 D G y 为(单位: kJ·mol - 1 )A. - 268.7 B. - 177.8 C. - 119.9 D. 119.9
【简答题】阅读下面的短文,然后根据短文内容选择最佳答案。 It's Jimmy's birthday and he is 9 years old. He gets a lot of presents from his family and one of them is a big drum (鼓). His grandfather buys it for him. Jimmy likes it very m...