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【05】下册 综合 03 PPT版 (2006版化学《解析与检测》 )

  • 2026-05-09 14:44:39
【05】下册 综合 03 PPT版 (2006版化学《解析与检测》 )
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2026年《解析与检测——化学
下册 综合测试(三PPT版

  • 第14题
  • 燃料不充分燃烧,既浪费资源又污染空气。现有46g乙醇(C2H5OH),不完全燃烧时生成CO2和CO的质量比为33 :7,要使其完全燃烧生成CO2,至少需要补充O2的质量为  (      )

    A.4g         

    B.8      

    C.16          

    D.24

  • 解题思路:

① 设CO2CO的质量分别为33m7m

② 根据H元素守恒,由C2H5OH的质量,求出H2O的质量;

③ 根据C元素守恒,由C2H5OH的质量,求出CO2CO的质量;

④ 根据质量守恒定律,求出C2H5OH不完全燃烧消耗O2的质量;

⑤ 根据C2H5OH的质量,求出完全燃烧消耗O2的质量;

⑥ 完全燃烧与不完全燃烧消耗O2质量差,即为需要补充的氧气质量。

  • 第19题
  • 碳酸氢钠可以用于治疗胃酸过多症,反应的化学方程式为_____________。“侯氏制碱法”中的一个反应为:2NaHCO3 Na2CO3+ CO2 ↑+H2O,现将16.8g NaHCO3 固体加热一段时间后,剩余固体的质量为13.7 g,则剩余固体中NaHCO3 的质量为________g。

  • 解题思路:  差量法

① 根据固体减少的质量差,求出反应物中发生反应的NaHCO3质量;

② 反应前NaHCO3的质量减去发生反应消耗掉NaHCO3质量,即为剩余固体中NaHCO3的质量。

【01】综合测试01 PPT版 (2006版化学《解析与检测》 上册)
【02】综合测试02 PPT版 (2006版化学《解析与检测》 上册)
【03】下册 综合 01  PPT版 (2006版化学《解析与检测》 )
【04】下册 综合 02  PPT版 (2006版化学《解析与检测》 )
上册
九年级化学PPT(人教版2024版 •上册)共37个PPT
下册
九年级化学PPT(人教版2024版 •下册)共21个PPT

【近6年中招真题超详细解析】
【真题解析-06】2025年化学中招真题超详细解析
【真题解析-05】2024年化学中招真题超详细解析
【真题解析-04】2020年化学中招真题超详细解析
【真题解析-03】2021年化学中招真题超详细解析
【真题解析-02】2022年化学中招真题超详细解析
【真题解析-01】2023年化学中招真题超详细解析
点击下图夸克网盘链接(永久有效),即可获取近6年中招真题超详细解析课件PDF版。

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  1. CONNECT:[ UseTime:0.000566s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000574s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000254s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000258s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000517s ]
  6. SELECT * FROM `set` [ RunTime:0.001190s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000539s ]
  8. SELECT * FROM `article` WHERE `id` = 513122 LIMIT 1 [ RunTime:0.001790s ]
  9. UPDATE `article` SET `lasttime` = 1778312112 WHERE `id` = 513122 [ RunTime:0.003811s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000264s ]
  11. SELECT * FROM `article` WHERE `id` < 513122 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000485s ]
  12. SELECT * FROM `article` WHERE `id` > 513122 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.003940s ]
  13. SELECT * FROM `article` WHERE `id` < 513122 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000595s ]
  14. SELECT * FROM `article` WHERE `id` < 513122 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002037s ]
  15. SELECT * FROM `article` WHERE `id` < 513122 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.005207s ]
0.106863s