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30、(24分)(1)                                                   

(2)                                                                           

(3)                                                                         

(4)                           (5)                          

                                                                         ;

                                                                            

試題詳情

29.(15分)(1)                           、                                ;

(2)                                                                       ;

(3)                   ;

(4)                       

(5)                                                                     

試題詳情

28.(14分)(1)                                                          

(2)                                                                                ;

(3)                                                                                

(4)問題一:                                                       ;

措施:加熱或                                                     

問題二:試管中的氣體是淡棕紅色,而不是無色;

措施:                                          (填具體操作。不能增加裝置)。

問題三:                                                                 ;

措施:                                                                   。

試題詳情

      FeO?Cr2O3(s)+    Na2CO3(s)+    O2     Na2CrO4(s)+    Fe2O3(s)+    CO2;△H < 0

___________(填元素符號(hào))    ___________________________________

(2)______________________

(3)_______________________________________________________(用文字表達(dá))。

(4)______________________、______________________。

(5)______________________

試題詳情

27.(14分)

(1)步驟①中反應(yīng)的化學(xué)方程式為:

試題詳情

26.(15分)

(1)          (填名稱)    _____________________________。

(2)_____________________________,_____________________________。

(3)_____________________________。

(4)_________________________________________________________。

(5)_________________________________________________________。

試題詳情

25、(22分)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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24、(18分)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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23、(14分)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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dads4merica.com     

 

 

 

 

 

 

 

                  

 

 

 

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