中学生网络课堂本课配套习题挑战模式1/4
单选题
难度系数：
1.某元素R的氧化物的相对分子质量为m，其相同价态的硫化物的相对分子质量为n，则R元素的化合价为
| A: (m-n)/16 |
| B: (n-m)/16 |
| C: (m-n)/8 |
| D: (n-m)/8 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOS4jeWmqOiuvlLnmoTljJblkIjku7fkuLpY77yM6K+V6K+V55yL44CC
- 提示2：IOeUqFjliIbliKvooajnpLrmsKfljJbnianlkoznoavljJbniannmoTljJblrablvI/vvIzlho3or5Xor5XjgII=
- 提示3：IOagueaNruWMluWtpuW8j+WIl+aWueeoi+OAgg==
- 答案：Qg==
6K6+5rCn5YyW54mp5Li6UjxzdWI+Mjwvc3ViPk88c3ViPlg8L3N1Yj48YnI+5YiZ55u45a+55YiG5a2Q6LSo6YeP5Li6MlIrMTZYPW3igKbigKbigKbigKbigKbigKbikaA8YnI+56Gr5YyW54mp55qE5YyW5a2m5byP5Li6UjxzdWI+Mjwvc3ViPlM8c3ViPlg8L3N1Yj7vvIjlm6DkuLpT55qE6LSf5Lu35Li6LTLku7fvvIzkuI7msKflhYPntKDlkIzku7fvvIk8YnI+55u45a+55YiG5a2Q6LSo6YeP5Li6MlIrMzJYPW7igKbigKbigKbigKbigKbigKbikaE8YnI+5omA5Lul5Y+v5Lul5rGC6KejPGJyPlg9KG4tbSkvMTY=
本课配套习题挑战模式2/4
单选题
难度系数：
2.
已知X g R2O中含有Y g R，则表示R的相对原子质量的代数式为
| A: (X-Y)/16 |
| B: 8Y/(X-Y) |
| C: 16/(X-Y) |
| D: (X-Y)/8Y |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5qC55o2uUjxzdWI+Mjwvc3ViPk/kuK3lkKtS55qE6LSo6YeP5YiG5pWw5Y+v5Lul5YiX5Ye65pa556iL44CCPC9wPg==
- 提示2：PHA+6K6k55yf6K6h566X5Y2z5Y+v44CCPC9wPg==
- 答案：Qg==
PHA+6K6+UueahOebuOWvueWOn+WtkOi0qOmHj+S4ulrvvIzliJfmlrnnqIvlpoLkuIvvvJo8L3A+PHA+MlIgJm5ic3A7ICZuYnNwOyAvJm5ic3A7ICZuYnNwOyZuYnNwOyBSPHN1Yj4yPC9zdWI+TzwvcD48cD4yWiZuYnNwOyZuYnNwOyZuYnNwOyZuYnNwOyAvICZuYnNwOyZuYnNwOyAyWisxNjwvcD48cD4mbmJzcDtZIGcmbmJzcDsmbmJzcDsgLyZuYnNwOyAmbmJzcDsmbmJzcDsmbmJzcDsgWCBnPC9wPjxwPuWNs++8jDJaL++8iDJaKzE277yJPVkvWDwvcD48cD7lvpfvvJpaPTE2WS/vvIgyWC0yWe+8iT04WS/vvIhYLVnvvIk8L3A+
本课配套习题挑战模式3/4
单选题
难度系数：
3.
金属元素M的相对原子质量为88，它的化合价只有一种，已知它的磷酸盐的相对分子质量为454。则它的硫酸盐相对分子质量为
| A: 184 |
| B: 272 |
| C: 464 |
| D: 无法计算 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5LiN5aao6K6+5a6D55qE56O36YW455uQ5Li6TTxzdWI+eDwvc3ViPu+8iFBPPHN1Yj40PC9zdWI+77yJPHN1Yj55PC9zdWI+77yM6K+V6K+V55yL44CCPC9wPg==
- 提示2：PHA+6KaB5rOo5oSPWOWSjFnpg73mmK/mlbTmlbDjgII8L3A+
- 答案：QQ==
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
本课配套习题挑战模式4/4
单选题
难度系数：
4.
还原铁的某氧化物2.16g，可以得到1.68g 。则该种铁的氧化物的化学式为
| A: FeO |
| B: Fe2O3 |
| C: Fe3O4 |
| D: FeCO3 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5YWI566X5Ye66aKY5bmy6YeM5rCn5YyW54mp5LitRmXnmoTotKjph4/liIbmlbDjgII8L3A+
- 提示2：PHA+5LiN5aao5YiG5Yir5rGC566X5LiA5LiL5q+P5LiA5Liq6YCJ6aG55LitRmXnmoTotKjph4/liIbmlbDvvIznrKblkIjnmoTkvr/mmK/nrZTmoYjllabjgII8L3A+
- 答案：QQ==
PHA+RmXnmoTotKjph4/liIbmlbDmmK8xLjY4LzIuMTY9NzcuOCU8YnI+QemhueS4ujc3Ljgl77yM5pWF6YCJQeOAgjwvcD4=
