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短周期元素A、B、C、D原子序数依次增大，且C元素最高价氧化物对应的水化物，能电离出电子数相等的阴、阳离子．A、C位于同一主族，A为非金属元素，B的最外层电子数是次外层的3倍，B、C的最外层电子数之和与D的最外层电子数相等．E单质是生活中常见金属，其制品在潮湿空气中易被腐蚀或损坏． 请回答下列问题： （1）C的最高价氧化物对应水化物电子式为______，其中含有的化学键类型为______． （2）由上述A、B、C、D四种元素中的三种组成某种盐，水溶液显碱性，是家用消毒剂的主要成分．将该盐溶液滴入KI淀粉溶液中，溶液变为蓝色，则反应的离子方程式为______ （3）用石墨电极电解CD的饱和溶液，若反应后溶液的体积为200mL，测得pH为13，则阳极得到的气体的物质的量为______mol． （4）E元素与D元素可形成ED 2 和ED 3 两种化合物，下列说法正确的是（填序号）______． ①保存ED 2 溶液时，需向溶液中加入少量E单质 ②ED 2 只能通过置换反应生成，ED 3 只能通过化合反应生成 ③铜片、碳棒和ED 3 溶液组成原电池，电子由铜片沿导线流向碳棒④向淀粉碘化钾溶液和苯酚溶液中分别滴加几滴ED 3 的浓溶液，原无色溶液都变成紫色 （5）25℃时，将pH=4.00的A元素与D元素形成化合物AD的水溶液稀释1.00×10 3 倍，则稀释后溶液中各离子浓度必遵循的定量等式关系式是______． （6）将一定量的D单质通入一定浓度的苛性钾溶液，两者恰好完全反应（已知反应过程放热），生成物中有三种含D元素的离子，其中两种离子的物质的量（n）与反应时间（t）的变化示意图如图所示．该苛性钾溶液中KOH的质量是______．
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【简答题】The gap between sales figures for product X end product Y increased year on year, with product Y always selling less than product X.
【简答题】The gap between sales figures for product X and product Y increased year on year, with product Y always selling less than product X.
【简答题】什么是环境优先污染物?
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【简答题】A gap year (also known as year abroad, year out, year off, deferred year, bridging year, time off and time out) is a year during which students take time off and do something other than schooling, suc...
【单选题】The gap year will be meaningful for an 18-year-old if______.
A.
their parents help them make a thoughtful plan
B.
they do what they like
C.
they get enough financial support from their parents
D.
they spend time doing nothing in Cornwall
【单选题】Talk to any parent of a student who took an adventurous gap year (a year between school and university when some students earn money, travel, etc. ) and a misty look will come into their eyes. There a...
A.
They will become more motivated and organized.
B.
They need support from their parents.
C.
They will live more harmoniously with their parents.
D.
They will get their degree more easily.
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