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.
晴晴同学为测定某石灰石中碳酸钙的质量分数（杂质不与酸反应），向6.0g石灰石样品中逐滴加入稀盐酸至不再产生气泡为止，共生成二氧化碳气体2.2g. 试计算：该石灰石样品中碳酸钙的质量分数为多少
| A: 83.3% |
| B: 36.5% |
| C: 70% |
| D: 67.2% |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5Yip55So56Kz6YW46ZKZ5LiO55uQ6YW45Y+N5bqU55qE5YyW5a2m5pa556iL5byP77yM5qC55o2u5LqM5rCn5YyW56Kz55qE6LSo6YeP5rGC5Ye656Kz6YW46ZKZ55qE6LSo6YeP77yM5YaN5qC55o2u6LSo6YeP5YiG5pWw55qE6K6h566X5YWs5byP5rGC5Ye655+z54Gw55+z5qC35ZOB5Lit56Kz6YW46ZKZ55qE6LSo6YeP5YiG5pWw5Y2z5Y+v77ybPC9wPg==
- 答案：QQ==
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
本课配套习题挑战模式2/5
单选题
难度系数：
2.
在盛有一定质量的碳酸钙固体的锥形瓶中，滴加稀盐酸至没有气泡产生为止，刚好用去69.5ml（密度为1.05g/立方厘米）质量分数为10%的盐酸。反应后所得溶液中溶质的质量分数为
| A: 10% |
| B: 12% |
| C: 14% |
| D: 16% |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5YWI5YiG5Yir5rGC5Ye65LqM5rCn5YyW56Kz44CB5rCv5YyW6ZKZ44CB56Kz6YW46ZKZ55qE6LSo6YePPC9wPg==
- 提示2：PHA+5Y+N5bqU5pa556iL5byP5Lit5om+5rq26LSo77yM5Yqg5Yqg5YeP5YeP5om+5rq25ray44CCPC9wPg==
- 答案：Qw==
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
本课配套习题挑战模式3/5
单选题
难度系数：
3.
某同学将黄铜屑（由铜和锌形成的合金）取样8.0g，与8.0mL密度为1.17g/mL的稀硫酸反应完全，剩余固体的质量为6.7g，则该同学最后所得溶液中溶质的质量分数为
| A: 30.3% |
| B: 20.2% |
| C: 40.4% |
| D: 50.5% |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5a6e6aqM5LitSDxzdWI+Mjwvc3ViPlNPPHN1Yj40PC9zdWI+5a6M5YWo5Y+N5bqU5b2i5oiQWm5TTzxzdWI+NDwvc3ViPua6tua2suOAgueUsea2iOiAl+mHkeWxnlpu55qE6LSo6YeP77yM5qC55o2u5Y+N5bqU55qE5YyW5a2m5pa556iL5byP5Y+v5Lul6K6h566X55Sf5oiQWm5TTzxzdWI+NDwvc3ViPueahOi0qOmHj+OAgjxicj48L3A+
- 提示2：PHA+5pa556iL5byP5Lit5om+5rq26LSo77yM5Yqg5Yqg5YeP5YeP5om+5rq25YmC44CCPGJyPjwvcD4=
- 答案：QQ==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.
将16.9g碳酸钠与氯化钠的混合物加入到100g足量的7.3%的稀盐酸中，恰好完全反应时所得溶液中溶质的质量分数为
| A: 15% |
| B: 17% |
| C: 18% |
| D: 16% |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5YWI5qC55o2u55uQ6YW46K6h566X5Ye65YW25LuW54mp6LSo55qE6LSo6YeP44CCPC9wPg==
- 提示2：PHA+5YaN5rGC5Ye65rq26LSo55qE6LSo6YeP5LiO5rq25YmC55qE6LSo6YeP77yM5L6/5Y+v5rGC5Ye65rq26LSo55qE6LSo6YeP5YiG5pWw44CCPC9wPg==
- 提示3：PHA+5rOo5oSP4oCc5Y+N5bqU5pa556iL5byP5Lit5om+5rq26LSo77yM5Yqg5Yqg5YeP5YeP5om+5rq25ray4oCd55qE5Y6f5YiZ44CCPC9wPg==
- 答案：RA==
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
本课配套习题挑战模式5/5
单选题
难度系数：
5.将硫酸钠和氢氧化钠固体混合物20g加入到196g质量分数为10%的稀硫酸中恰好完全反应。反应后所得溶液中溶质的质量分数为
| A: 60% |
| B: 35% |
| C: 20% |
| D: 15% |
一次做对，真牛！
+5奖励规则>
- 提示1：5Zu65L2T5re35ZCI54mp5Lit55qE5rCi5rCn5YyW6ZKg5LiO56Gr6YW45Y+N5bqU55Sf5oiQ56Gr6YW46ZKg5ZKM5rC077yM5qC55o2u5Y+N5bqU55qE5YyW5a2m5pa556iL5byP77yM55Sx5Y+N5bqU5raI6ICX56Gr6YW455qE6LSo6YeP5Y+v6K6h566X55Sf5oiQ55qE56Gr6YW46ZKg55qE6LSo6YeP5Lul5Y+K5Y+C5Yqg5Y+N5bqU5rCi5rCn5YyW6ZKg55qE6LSo6YeP77yM5re35ZCI54mp6LSo6YeP5LiO5rCi5rCn5YyW6ZKg6LSo6YeP5LmL5beu5bCx5piv5Y6f5re35ZCI54mp5Lit56Gr6YW46ZKg55qE6LSo6YeP77yb
- 提示2：5Y+N5bqU5ZCO5omA5b6X5rq25ray5Li656Gr6YW46ZKg5rq25ray77yM5YW25rq26LSo56Gr6YW46ZKg6LSo6YeP5Li65Y6f5re35ZCI54mp5Lit5omA5ZCr56Gr6YW46ZKg5LiO5Y+N5bqU55Sf5oiQ56Gr6YW46ZKg6LSo6YeP5ZKMLg==
- 答案：RA==
PGltZyB3aWR0aD0zOTEgaGVpZ2h0PTI0MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzEwL0Q3L3JCQUNGRk1TN3BleE5lNVFBQUFkVnkzSWhJODYyMC5wbmciID48YnI+
