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21.(9分) (1)名称是                ;固体B的化学式为                      

(2)步骤①化学方程式                                                       

步骤④化学方程式                                                       

(3)                                                                       

(4)                                                                       

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20.(9分)(1)A               ;B                 ;C                  

(2)化学方程式:                                                               

                                                                             

(3)规律:                                                                    

                                                                              

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19.(6分) (1)金属铜的                 性。

 

(2)①化学方程式:                                                           

       ②分馏属于                变化;

③设计的优点:                                                          

                                                                         

(3)内部火焰的作用是                                                       

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18.(4分)依据的现象是                                                        

得出的结论是                                                             

金属A是                              ,溶液B是                         

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17.(7分)(1)                                   。(2)X=                      

(3)                                  (4)                                 

(5)化学方程式:                                                           

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16.(3分)(1)原因是                                                            

(2)X的化学式               ,推断的依据是                                 

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15.(4分)  (1)            (2)              (3)               (4)              

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可能用到的相对原子质量:H-1  C-12  N-14  O-16  Na-23  S-32  Cl-35.5

                           Ca-40  Zn-65

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      4.考生必须保持答卷整洁,考试结束后,将试题、答题卡、答卷一并交回。

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      3.第一卷使用答题卡答题,考生必须用规定的铅笔将答题卡上相对应所选的选项涂黑;第二卷必须用黑色或蓝色字迹的钢笔或签字笔作答,答案必须写在答卷各题目指定区域内相应位置上,不准使用铅笔或红笔。

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