在某一容积为5 L的密闭容器内,加入0.2 mol的CO和0.2 mol的H2O

题型:填空题

问题:

在某一容积为5 L的密闭容器内,加入0.2 mol的CO和0.2 mol的H2O(g),在催化剂存在的条件下高温加热,发生如下反应:CO(g)+H2O(g) CO2(g)+H2(g),反应放出热量。反应中CO2的浓度随时间变化的情况如图所示:

(1)根据图中数据,从反应开始至达到平衡时,CO的化学反应速率为________;反应平衡时c(H2)=________。

(2)判断该反应达到平衡的依据是________(填序号)。

①CO减小的化学反应速率和CO2减小的化学反应速率相等

②CO、H2O、CO2、H2的浓度都相等

③CO、H2O、CO2、H2的浓度都不再发生变化

④正、逆反应速率都为零

考点:化学反应速率的定义、公式
题型:填空题

邓 * * 家中挂有一幅《双猫图》。一只猫毛色雪白、茸毛轻柔,另一只猫毛色乌黑、黑黑透亮。画的上方,是几行遒劲苍老的题词:“不管白猫黑猫,会捉老鼠的就是好猫。”它生动形象地反映了邓 * * 怎样的思想精髓? [ ]

A.家庭联产承包责任制

B.社会主义市场经济

C.一国两制、祖国统一

D.解放思想,实事求是

题型:填空题
完形填空。
     Life is not easy, so I'd like to say "When anything happens, believe in yourself." When I was a young boy,
I was    1    shy to talk to anyone. My classmates often    2    me. I was sad but could do nothing. Later,    3    
happened, and it changed my life. It was an English speech contest. My mother asked me to    4    it. What a
terrible idea! It meant I had to speak    5    all the teachers and students of my school! "Come on, boy. Believe
in yourself. You are sure to    6   ." Then mother and I talked about many different topics. At last I    7    the
topic "Believe in yourself". I tried my best to remember all the speech and practiced it over 100    8   . With
mother's great love, I did    9    in the contest. I could hardly believe my   10    when the news came that I had
won the first place. I heard the cheers (赞美)   11   the teachers and students. Those classmates   12   once
looked down on (瞧不起) me, now all said "Congratulations!"   13   me. My mother hugged me and cried
excitedly.   14   then, everything has changed for me. When I do anything, I try to tell   15   to be sure and I
will find myself. This is true not only for a person but also for a country.
( )1. A. too            
( )2. A. made faces at  
( )3. A. nothing       
( )4. A. take part in   
( )5. A. with          
( )6. A. lose          
( )7. A. brought       
( )8. A. words         
( )9. A. well          
( )10. A. result         
( )11. A. from           
( )12. A. when           
( )13. A. to             
( )14. A. Except         
( )15. A. someone        
B. so            
B. looked after   
B. something     
B. join          
B. to            
B. win           
B. reached       
B. times         
B. good          
B. speech        
B. of            
B. what          
B. at            
B. Since         
B. me            
C. quite            
C. caught up with   
C. everything       
C. get              
C. among            
C. pass             
C. thought          
C. topics         
C. bad              
C. eyes             
C. for              
C. which            
C. with             
C. Before           
C. everyone       

D. very         
D. laughed at                 
D. anything     
D. make         
D. before       
D. beat         
D. chose        
D. sentences    
D. interested   
D. ears         
D. to           
D. who          
D. on           
D. From         
D. myself       

题型:填空题

检查隐裂牙齿采用

A.电活力测验
B.X线检查
C.染色法
D.麻醉试法
E.嗅诊

题型:填空题

运输市场本身是一个具有多重含义的概念,主要包括()。

A.运输市场是不同运输方式组成的综合运输体系

B.运输市场是运输产品交换的场所,亦即买卖双方发生联系和作用的地点

C.运输市场是运输产品供求关系的总和

D.运输市场是运输供给与运输需求的平衡

E.运输市场是在一定时空条件下对运输产品需求的总和

题型:填空题

焦糖反应

更多题库