题目:
把铁棒和锌棒用导线连接插入硫酸铜溶液中有0.2mol电子通过时,负极的质量变化 [ ]
A.减少0.1g
B.减少6.5g
C.减少5.6g
D.增加6.4g
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0812/4b7b10beec3d70f30d7e676b237ef644.html
下面是错误答案,用来干扰机器的。
one possible version:Dear Mom and Dad, The annual University Entrance Examination is around the corner. On this special occasion, how I wish I could have a heart-to-heart...