问题
填空题
We are sorry for the trouble the printer has caused you, but we are confident that it can be fixed ____________ your complete satisfaction.
答案
参考答案:to
We are sorry for the trouble the printer has caused you, but we are confident that it can be fixed ____________ your complete satisfaction.
参考答案:to
有下列七种溶液:A、氢氧化钠溶液;B、氢氧化钡溶液;C、硫酸铝溶液;D、明矾溶液;E、混有少量硝酸的硫酸镁溶液;F、氯化铁溶液;任取其中的一种溶液(甲)逐滴加入到另一种溶液(乙)中至过量,观察到自始至终均有白色沉淀.试回答下列问题:
(1)产生上述实验现象的试剂组合有(请用字母代号逐一列出,表格各栏可填满,可不填满,也可补充)
组别 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
甲 | B | |||||||
乙 | D |
(3)如图是某一组实验中所得沉淀的物质的量(n沉淀/mol)随甲溶液中溶质的物质的量(n甲/mol)变化的曲线.符合图(右)曲线的试剂组合是:甲______(填化学式)、乙______(填化学式).