皮皮学,免费搜题
登录
搜题
【简答题】
(11分)X、Y、Z、W和N均是由短周期元素组成的五种化合物。已知五种化合物水溶液的焰色反应均呈黄色,Y、Z和N均由三种元素组成。请根据题目要求回答下列问题。 (1)固体化合物X为浅黄色粉末,该化合物中含有的化学键有________(填序号)。 A.离子键 B.极性共价键 C.非极性共价键 D.氢键 (2)写出X与二氧化碳反应的化学方程式 ________________________________________________________________________。 (3)下表为Y与Z实验的部分内容: 序号 主要实验步骤及实验现象 ① 在含Y的溶液中,加入稀硫酸放置,产生浅黄色沉淀和无色有刺激性气味的气体,该气体可使品红溶液褪色 ② 在含Z的溶液中,滴加盐酸,开始有白色沉淀,继续滴加盐酸,白色沉淀先增加后消失,然后加入过量的氨水又出现白色沉淀 ③ 将实验②最终得到的混合物加热蒸发、灼烧,最终得到白色固体 写出Y与稀硫酸反应的离子方程式 ________________________________________________________________________。 (4)写出含0.1 mol Z的溶液与20 mL 5 mol·L -1 的盐酸反应的离子反应式 __________________________。实验③加热蒸发、灼烧得到的最终产物主要是________。 (5)化合物W和N可以相互转化:W△CO2+H2ON。若有W和N·xH 2 O的混合物6.52 g,加热到完全反应后,气体产物通过浓硫酸增重1.71 g,剩余气体通过碱石灰增重1.10 g,则混合物中W的质量为________,N·xH 2 O的化学式为__________。
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【判断题】李叔同早年曾在日本成立春柳社,亲自出演 “茶花女”的角色。
A.
正确
B.
错误
【单选题】( )6. Which of the following is True?
A.
The writer got rid of the training wheels earlier than her younger sister.
B.
The writer’s friends must make fun of her if she kept the training wheels on Bike Safety Day.
C.
The writer was proud when her father removed the training wheels.
D.
The writer decided to remove the training wheels before Bike Safety Day.
【单选题】One reason why the writer was successful in her first business was that
A.
she was used to dealing with people.
B.
she was open with the staff.
C.
the business was already doing well when she started.
D.
the staff agreed with all her decisions.
【判断题】1970年,李叔同在日本留学生中组织春柳社,并上演《茶花女》《黑奴吁天录》,开创了中国话剧的先河。
A.
正确
B.
错误
【单选题】The writer was surprised that_________ .A. the woman was sitting by her windowB. th
A.
12. The writer was surprised that _________ . A. the woman was sitting by her window
B.
the woman's window was clean
C.
the woman did cleaning in the afternoon
D.
the woman's window was still terrible
【单选题】中国古代十分讲究家风、家规,有的家规虽然对人的成长有一定的束缚,但是在今天依然有积极作用,这是因为( ) 21*cnjy*com
A.
好的家风能营造良好的家庭氛围,促进个人的成长进步
B.
家庭经济条件好,才能促进个人健康成长
C.
凡是古人流传下来的家风都是值得我们学习的
D.
家风好是因为家人的积极传承
【单选题】Which of the following is NOT correct?
A.
The writer was not used to bargaining.
B.
People in Asia always bargain when buying things.
C.
Bargaining in Laos was quiet and peaceful.
D.
The writer was ready to bargain with the woman.
【简答题】李叔同《茶花女》
【单选题】The father was not happy when the writer was going to Israel because_.
A.
it was not safe
B.
it was too far away
C.
he liked England
D.
he wanted the writer to go to England
【单选题】Which of the following in NOT corret?
A.
The writer was not used to bargaining.
B.
People in Asia always bargain when buying things.
C.
Bargaining in Laos was quiet and peaceful.
D.
The writer was ready to bargain with the woman.
相关题目: