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【09】下册 综合 07 PPT版 (2026版化学《解析与检测》 )

  • 2026-10-27 12:54:56
【09】下册 综合 07 PPT版 (2026版化学《解析与检测》 )
  • 第14题

  • 解题思路：

  • 金属混合物中Zn、Fe的比例没有说明，故无法根据氢气的质量求出金属的质量，能计算的是两个极限，①设金属全部是Zn，②设金属全部是Fe

  • 根据化学方程式：

    ①  Zn＋H2SO4 ＝ ZnSO4＋H2↑

    ②  Fe＋H2SO4 ＝ FeSO4＋H2↑

    可由氢气的质量分别求出Zn、Fe的质量m1＝13g，m2＝11.2g

  • 因此，Zn、Fe混合物生成0.4g氢气，消耗金属的质量为11.2g＜m＜13g

  • 解析过程：

  • 第19题
  • 解析过程：
  • 第20题
  • 解析过程：
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2026版 化学《解析与检测》下册 综合(七)
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  1. 请求信息 : 2026-11-02 00:07:38 HTTP/1.1 GET : http://h.sjds.net/a/523752.html
  2. 运行时间 : 0.078853s [ 吞吐率：12.68req/s ] 内存消耗：4,294.79kb 文件加载：140
  3. 缓存信息 : 0 reads,0 writes
  4. 会话信息 : SESSION_ID=0a723ea5ddec1b7b02e7942a80737664
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  1. CONNECT:[ UseTime:0.000592s ] mysql:host=172.18.0.4;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000756s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000413s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000316s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000512s ]
  6. SELECT * FROM `set` [ RunTime:0.000291s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000563s ]
  8. SELECT * FROM `article` WHERE `id` = 523752 LIMIT 1 [ RunTime:0.000366s ]
  9. UPDATE `article` SET `lasttime` = 1793549258 WHERE `id` = 523752 [ RunTime:0.001312s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000408s ]
  11. SELECT * FROM `article` WHERE `id` < 523752 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000402s ]
  12. SELECT * FROM `article` WHERE `id` > 523752 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000423s ]
  13. SELECT * FROM `article` WHERE `id` < 523752 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000493s ]
  14. SELECT * FROM `article` WHERE `id` < 523752 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000571s ]
  15. SELECT * FROM `article` WHERE `id` < 523752 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000699s ]
0.091380s