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【09】下册 综合 07 PPT版 (2026版化学《解析与检测》 )

  • 2026-05-31 03:48:28
【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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  139. /yingpanguazai/ssd/ssd1/www/h.sjds.net/runtime/temp/ad153693ed39fba6d1bda2fe72512cde.php ( 12.06 KB )
  140. /yingpanguazai/ssd/ssd1/www/h.sjds.net/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.001063s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001472s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000616s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000642s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001194s ]
  6. SELECT * FROM `set` [ RunTime:0.000532s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001348s ]
  8. SELECT * FROM `article` WHERE `id` = 523752 LIMIT 1 [ RunTime:0.005755s ]
  9. UPDATE `article` SET `lasttime` = 1780320922 WHERE `id` = 523752 [ RunTime:0.009256s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000647s ]
  11. SELECT * FROM `article` WHERE `id` < 523752 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001043s ]
  12. SELECT * FROM `article` WHERE `id` > 523752 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.003877s ]
  13. SELECT * FROM `article` WHERE `id` < 523752 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001273s ]
  14. SELECT * FROM `article` WHERE `id` < 523752 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003890s ]
  15. SELECT * FROM `article` WHERE `id` < 523752 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.006937s ]
0.209230s