某金属M的氢氧化物的结晶水合物M(OH)2·xH2O与Na2CO3的混合物共36

题型:计算题

问题:

某金属M的氢氧化物的结晶水合物M(OH)2·xH2O与Na2CO3的混合物共36.8g,加入足量的水后,生成白色沉淀(沉淀中不含结晶水),将沉淀过滤、洗涤、烘干,称得其质量为9.85g,将得到的沉淀高温灼烧后,质量变为7.65g,滤液与酸作用不产生气体,若用足量的铵盐与滤液共热,则产生4.48L气体(标准状况)。

(1)滤液中n(OH)=____________mol

(2)M的相对原子质量_____________________

(3)M的氢氧化物的结晶水合物的化学式为____________________

(4)将M的此氢氧化物与NH4Cl置右图所示装置(玻璃片中与烧杯底部之间有一薄层水)中混合反应后,用手拿起烧杯时,玻璃片将___________________,与该反应对应的能量变化关系图是_________

考点:芳香烃的通式烷烃的通性烯烃的通性炔烃的通性
题型:计算题

阅读理解。

     Betty is an American school girl. She is very happy because her parents will take her to China for a

visit. They are going to fly from New York on June 30 and get to Beijing on July 1. They will stay at

Lido Holiday Inn. Their Chinese friends will show them around Beijing. They are going to visit the

Palace Museum, the Summer Palace, the Temple of Heaven and the Great Wall. They will also visit

some Chinese homes and try some Chinese food. They will spend a week in Beijing and then go to

Xi'an, Guilin and some other places for sightseeing. The whole trip will take three weeks and she

is sure she will have a great time in China.

1. Betty is very happy because she will ______ with her parents.   [ ]

A. visit China   

B. go home   

C. watch TV   

2. Their ______ friends will show them around Beijing.    [ ]

A. Australian   

B. Chinese   

C. American  

3. From the text we can know that they will ______ in Beijing.   [ ]

A. cook Chinese food   

B. Learn to speak Chinese    

C. try some Chinese food   

4. After they visit Beijing, they will go to ______.   [ ]

A. Xi'an and Guilin   

B. The Summer Palace      

C. Shanghai   

5. How long will the whole trip take?   [ ]

A. one week   

B. two weeks   

C. three weeks

题型:计算题

---- I don't ________ playing football.

---- Really? So what are you ________ in?

A.like; interested

B.like; tasted

C.prefer; excited

D.prefer; surprised

题型:计算题

下列词语中,没有错别字的一组是(   )
A.污告、势利眼、卷帙浩繁、化干戈为玉帛
B.掣肘、园舞曲、茹毛饮血、事实胜于雄辩
C.辖制、满堂彩、飒爽英姿、口慧而实不至
D.荣膺、舶来品、金蝉脱壳、水至清则无鱼

题型:计算题

胫腓骨干骨折用跟骨牵引进针时,跟骨外侧应比内侧高1cm,这是为了使()。

A.足跟内旋

B.足跟外旋

C.足跟轻度内翻

D.足跟外翻

E.避免损伤重要血管、神经

题型:计算题
_______ Lucy _______ Lily may go to the concert with you. Because they are not allowed to go out on
school nights.

A. either, or
B. neither, nor
C. both, and
D. not only, but also
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