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.已知14mol/L的H2SO4溶液的溶质质量分数为80%，那么7mol/L的H2SO4溶液的溶质量分数将
| A: 大于40% |
| B: 等于40% |
| C: 小于40% |
| D: 无法确定 |
一次做对，真牛！
+5奖励规则>
- 提示1：Yz08aW1nIHdpZHRoPTM3IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0Y2L0Q5L3JCQUNFMVlLU0l1amJSWmlBQUFCd2dqeEVqbzI2MS5wbmciPu+8jOWIhuWIq+WIl+WHuuS4pOS4qua6tua2suS4reeahOivpeetieW8j++8jOW5tuWBmuS4gOS4quavlOWAvO+8jOWwseWPr+S7peWFs+iBlOS4pOS4quWvhuW6puWSjOS4pOS4qui0qOmHj+WIhuaVsOOAgg==
- 答案：QQ==
6K6+MTRtb2wvTOeahEg8c3ViPjI8L3N1Yj5TTzxzdWI+NDwvc3ViPua6tua2sueahOWvhuW6puS4us+BPHN1Yj4xPC9zdWI+77yMN21vbC9M55qESDxzdWI+Mjwvc3ViPlNPPHN1Yj40PC9zdWI+5rq25ray55qE5a+G5bqm5Li6z4E8c3ViPjI8L3N1Yj7vvIzotKjph4/liIbmlbDkuLp3PHN1Yj4yPC9zdWI+77yMYz08aW1nIHdpZHRoPTM3IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0Y2L0Q5L3JCQUNFMVlLU0l1amJSWmlBQUFCd2dqeEVqbzI2MS5wbmciPu+8jOWImeaciTxpbWcgd2lkdGg9MTE2IGhlaWdodD01MyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzg5Lzg1L3JCQUNGRllLU0puQlRDcURBQUFHWlVkSHBrYzQ1My5wbmciPu+8jDxpbWcgd2lkdGg9ODggaGVpZ2h0PTUxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvQzAvMTAvckJBQ0psWUtTSm13YTE0RkFBQUY4SjZHeHNZNTkuanBlZyI+77yMPGJyPuaVhTxpbWcgd2lkdGg9OTggaGVpZ2h0PTQ2IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvQzAvNEQvckJBQ0oxWUtTSnF3MVRxcUFBQUdOYk9mNWRjNzQ3LnBuZyI+77yMPGJyPjxpbWcgd2lkdGg9ODIgaGVpZ2h0PTUwIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvQzAvNEQvckJBQ0oxWUtTSnJRUlVlT0FBQUZNcU5ERU9FMzUyLnBuZyI+PGJyPuehq+mFuOWvhuW6puWkp+S6juawtO+8jOa1k+W6pui2iuWkp++8jOWvhuW6pui2iuWkp++8jOWImc+BPHN1Yj4xPC9zdWI+77yez4E8c3ViPjI8L3N1Yj7vvIzmiYDku6V3PHN1Yj4yPC9zdWI+77yeNDAl77yM
本课配套习题挑战模式2/5
单选题
难度系数：
2.体积为VmL，密度为dg/ml，溶质的摩尔质量为Mg•mol-1，物质的量浓度为cmol•L-1，溶质的质量分数为a%，溶质的质量为mg．下列式子正确的是
A: m= |
B: c= |
C: c= |
D: a%= |
一次做对，真牛！
+5奖励规则>
- 提示1：Yz08aW1nIHdpZHRoPTM3IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0Y2L0Q5L3JCQUNFMVlLU0l1amJSWmlBQUFCd2dqeEVqbzI2MS5wbmciPg==
- 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.用质量分数为ω的浓盐酸（其密度为ρ1g﹒cm-3），按浓盐酸与水的体积比为1﹕3配制成稀盐酸（其密度为ρ2g﹒cm-3），则所配制稀盐酸的物质的量浓度为
A:  |
B:  |
C:  |
D:  |
一次做对，真牛！
+5奖励规则>
- 提示1：Yz08aW1nIHdpZHRoPTM3IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0Y2L0Q5L3JCQUNFMVlLU0l1amJSWmlBQUFCd2dqeEVqbzI2MS5wbmciPg==
- 提示2：5qC55o2u55uQ6YW45rq26LSo5YiX5pa556iL5Y+v6K6h566X5Ye65re35ZCI5ZCO55uQ6YW45Lit5rCv5YyW5rCi55qE6LSo6YeP5YiG5pWw44CC
- 答案：Qw==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.若以w1和w2分别表示物质的量是浓度为c1mol/L和c2mol/L氨水溶液的质量分数，已知2w1=w2，则下列推断正确的是（已知氨水的密度小于纯水的密度）
| A: 2c1=c2 |
| B: 2c2=c1 |
| C: c2＞2c1 |
| D: c1＜c2＜2c1 |
一次做对，真牛！
+5奖励规则>
- 提示1：Yz08aW1nIHdpZHRoPTM3IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0Y2L0Q5L3JCQUNFMVlLU0l1amJSWmlBQUFCd2dqeEVqbzI2MS5wbmciPu+8jDJ3PHN1Yj4xPC9zdWI+PXc8c3ViPjI8L3N1Yj7vvIzlm6DmraTlj6/ku6Xmr5TovoNjPHN1Yj4xPC9zdWI+44CBYzxzdWI+Mjwvc3ViPuOAgg==
- 提示2：5bCGYzxzdWI+MTwvc3ViPuOAgWM8c3ViPjI8L3N1Yj7lgZrkuIDkuKrmr5TlgLzvvIzmnIDnu4jlvpfliLDnlKjPgeihqOekuueahOWAvO+8jOWwseWPr+S7peWIpOaWrTJDPHN1Yj4xPC9zdWI+44CBQzxzdWI+Mjwvc3ViPueahOWFs+ezu+OAgg==
- 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.某结晶水合物的化学式为A•nH2O，其相对分子质量为M，在25℃时，ag晶体溶于bg水中即达饱和，形成密度为ρg•mL-1的溶液，下列表达式正确的是
| A: 饱和溶液的物质的量浓度为：1000a（M-18n）/M（a+b）mol•L-1 |
| B: 饱和溶液中溶质的质量分数为：100a（M-18n）/M（a+b）% |
| C: 饱和溶液的体积为：（a+b）/ρL |
| D: 25℃时，A的溶解度为：100a（M-18n）/bMg |
一次做对，真牛！
+5奖励规则>
- 提示1：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
- 答案：Qg==
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
