中学生网络课堂本课配套习题挑战模式1/5
单选题
难度系数：
1.
镁铝合金M克和足量的盐酸反应生成H20.1克，则M可能是
| A: 0·8g |
| B: 1g |
| C: 1.5g |
| D: 无法确定 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5L6d5o2u4oCc5p6B5YC85rOV4oCdPC9wPg==
- 提示2：PHA+55Sf5oiQSDxzdWI+PGZvbnQgc2l6ZT0iMiI+MjwvZm9udD48L3N1Yj4gMC4x5YWL6Iul5Y+q5pyJ6ZWB5Y+C5LiO5Y+N5bqU6ZyA6KaB6ZWBMS4yZzwvcD4=
- 提示3：PHA+55Sf5oiQSDxzdWI+PGZvbnQgc2l6ZT0iMiI+MjwvZm9udD48L3N1Yj4gMC4x5YWL6Iul5Y+q5pyJ6ZOd5Y+C5LiO5Y+N5bqU6ZyA6KaB6ZOdMC45ZzwvcD4=
- 答案：Qg==
PHA+6aaW5YWI77yM5YGH6K6+55Sf5oiQSDxzdWI+Mjwvc3ViPiAwLjHlhYvoi6Xlj6rmnInplYHlj4LkuI7lj43lupTpnIDopoHplYExLjJn77ybPGJyPjwvcD48cD7lhbbmrKHvvIzlgYforr7nlJ/miJBIPHN1Yj4yPC9zdWI+IDAuMeWFi+iLpeWPquaciemTneWPguS4juWPjeW6lOmcgOimgemTnTAuOWfvvJs8YnI+PC9wPjxwPuS+neaNruKAnOaegeWAvOazleKAneWPr+aOqOefpU3ku4vkuo4xLjJnfjAuOWfkuYvpl7TjgILmlYXnrZTmoYjpgIlCPGJyPjwvcD4=
本课配套习题挑战模式2/5
单选题
难度系数：
2.
一定量的木炭在盛有氮气和氧气混合气体的密闭容器中燃烧后生成CO和CO2，且测得反应后所得CO、CO2、N2的混合气体中碳元素的质量分数为24%，则其中氮气的质量分数可能为
| A: 10% |
| B: 30% |
| C: 50% |
| D: 70% |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+6Iul5re35ZCI5rCU5Lit5Y+q5pyJQ0/lkoxOPHN1Yj4yPC9zdWI+77yM5YiZ56Kz5YWD57Sg55qE6LSo6YeP5YiG5pWw5Li6MjQl77yM5a+55bqU5rCn5YWD57Sg55qE6LSo6YeP5YiG5pWw5Li6MzIl77yM5rCu5rCU5YiZ5Li6MS0yNCUtMzIlPTQ0JTwvcD4=
- 提示2：PHA+6Iul5re35ZCI5rCU5Lit5Y+q5pyJQ088c3ViPjI8L3N1Yj7lkoxOPHN1Yj4yPC9zdWI+77yM5YiZ56Kz5YWD57Sg55qE6LSo6YeP5YiG5pWw5Li6MjQl77yM5a+55bqU5rCn5YWD57Sg55qE6LSo6YeP5YiG5pWw5Li6NjQl77yM5rCu5rCU5YiZ5Li6MS0yNCUtNjQlPTEyJTwvcD4=
- 提示3：PHA+5rCu5rCU55qE6LSo6YeP5YiG5pWw5LuL5LqOMTIlfjQ0JeS5i+mXtDwvcD4=
- 答案：Qg==
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
本课配套习题挑战模式3/5
单选题
难度系数：
3.
某合金20g与稀硫酸反应生成2gH2，则此合金中一定含有的金属是
| A: Na |
| B: Cu |
| C: Al |
| D: Fe |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5L6d5o2u4oCc5p6B5YC85rOV4oCd5Y+v5o6o55+l5ZCI6YeR5Lit5a+55bqU6YeR5bGe5omA5raI6ICX55qE6LSo6YeP55Sx5aSn5LqOMjBn5LiO5bCP5LqOMjBn57uE5oiQ44CCPGJyPjwvcD4=
- 提示2：PHA+55Sf5oiQMmcgSDxzdWI+Mjwvc3ViPuiLpeWPquaciU5h5Y+C5LiO5Y+N5bqU6ZyA6KaBNDZnIE5h77ybPGJyPjwvcD48cD7nlJ/miJAyZyBIPHN1Yj4yPC9zdWI+6Iul5Y+q5pyJQWzlj4LkuI7lj43lupTpnIDopoExOGcgQWzvvJs8YnI+PC9wPjxwPueUn+aIkDJnIEg8c3ViPjI8L3N1Yj7oi6Xlj6rmnIlGZeWPguS4juWPjeW6lOmcgOimgTU2ZyBGZe+8mzxicj48L3A+PHA+Q3XkuI3kuI7nqIDnoavphbjlj43lupTnlJ/miJDmsKLmsJTvvIzlj6rljaDlkIjph5HnmoTotKjph4/jgILlnKjov5nph4zlj6/ku6XnkIbop6PkuLrpnIDopoHml6DpmZDlpJrnmoTotKjph4/jgII8YnI+PC9wPg==
- 答案：Qw==
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
本课配套习题挑战模式4/5
多选题
难度系数：
4.
将一定质量的Mg、Zn、Al混合物与足量稀H2SO4反应，生成H2 0.25g，原混合物的质量可能是
| A: 2g |
| B: 4g |
| C: 8g |
| D: 10g |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5pys6aKY57uZ5Ye655qE5pWw5o2u5LiN6Laz77yM5pWF5LiN6IO95rGC5Ye65q+P5LiA56eN6YeR5bGe55qE6LSo6YeP77yM5Y+q6IO956Gu5a6a5Y+W5YC86IyD5Zu044CCPC9wPjxwPueUn+aIkEg8c3ViPjI8L3N1Yj4gMC4yNWfvvIzoi6Xlj6rmnIlNZ+WPguS4juWPjeW6lOmcgOimgTNnTWfvvJs8L3A+PHA+55Sf5oiQSDxzdWI+Mjwvc3ViPiAwLjI1Z++8jOiLpeWPquaciVpu5Y+C5LiO5Y+N5bqU6ZyA6KaBOC4xMjVnWm7vvJs8L3A+PHA+55Sf5oiQSDxzdWI+Mjwvc3ViPiAwLjI1Z++8jOiLpeWPquaciUFs5Y+C5LiO5Y+N5bqU6ZyA6KaBMi4yNWdBbOOAgjwvcD4=
- 提示2：PHA+5qC55o2u4oCc5p6B5YC85rOV4oCd77yM5re35ZCI54mp55qE6LSo6YeP5Y+q6IO95LuL5LqOMi4yNWd+OC4xMjVn5LmL6Ze044CCPC9wPg==
- 答案：QixD
PHA+5LiJ56eN6YeR5bGe5Lit5Lqn55Sf562J6YeP55qE5rCi5rCU5raI6ICX6YeR5bGe6LSo6YeP5pyA5aSn55qE5Li66ZSM77yM6LSo6YeP5pyA5bCP55qE5Li66ZOd44CC5pWF5YGH6K6+6YeR5bGe5YWo6YOo5Li66ZSM77yM5Y+v5rGC5Ye655qE6YeR5bGe6LSo6YeP5Li6OC4xMjVn77yM5YGH6K6+6YeR5bGe5YWo6YOo5Li66ZOd77yM5Y+v5rGC5Ye655qE6YeR5bGe6LSo6YeP5Li6Mi4yNWfjgII8YnI+PC9wPjxwPuaVhemHkeWxnueahOWunumZhei0qOmHj+W6lOWcqDIuMjVnIO+9njguMTI1Z+S5i+mXtOOAgjwvcD4=
本课配套习题挑战模式5/5
单选题
难度系数：
5.
某混合物含有KCl、NaCl和Na2CO3，经分析含钠31.5％，含氯27.08％（以上均为质量分数），则混合物中Na2CO3的质量分数为
| A: 25% |
| B: 50% |
| C: 80% |
| D: 无法确定 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5Y+v6YeH55So4oCc5p6B5YC85rOV4oCd44CCPC9wPg==
- 提示2：PHA+5YGH6K6+5ZCr5rCvMjcuMDgl5re35ZCI54mp5Lit5Y+q5pivS0Ns5ZKMTmE8c3ViPjxmb250IHNpemU9IjIiPjI8L2ZvbnQ+PC9zdWI+Q088c3ViPjxmb250IHNpemU9IjIiPjPjgII8L2ZvbnQ+PC9zdWI+PC9wPg==
- 提示3：PHA+5YGH6K6+5ZCr5rCvMjcuMDgl5re35ZCI54mp5Lit5Y+q5pivTmFDbOWSjE5hPHN1Yj48Zm9udCBzaXplPSIyIj4yPC9mb250Pjwvc3ViPkNPPHN1Yj48Zm9udCBzaXplPSIyIj4z44CCPC9mb250Pjwvc3ViPjwvcD4=
- 答案：Qg==
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
