中学生网络课堂本课配套习题挑战模式1/5
已知氢氧化铝的化学式为Al(OH)3，氢氧化铝的式量是
| A: 78 |
| B: 43 |
| C: 87 |
| D: 34 |
- 提示1：PHA+55u45a+55YiG5a2Q6LSo6YeP5piv5ZCE5YWD57Sg55u45a+55Y6f5a2Q6LSo6YeP55qE5ZKMPC9wPg==
- 提示2：PHA+QWznmoTnm7jlr7nljp/lrZDotKjph4/mmK8yN++8myBP55qE55u45a+55Y6f5a2Q6LSo6YeP5pivMTY7IEjnmoTnm7jlr7nljp/lrZDotKjph4/mmK8x44CCPGJyPjwvcD4=
- 答案：QQ==
PHA+QWwoT0gpPHN1Yj4zPC9zdWI+55qE5byP6YePPTI3K++8iDE277yLMe+8icOXMz03ODwvcD4=
本课配套习题挑战模式2/5
碳酸钙的相对分子质量是
| A: 100 |
| B: 90 |
| C: 80 |
| D: 70 |
- 提示1：PHA+55u45a+55YiG5a2Q6LSo6YeP5piv5ZCE5YWD57Sg55u45a+55Y6f5a2Q6LSo6YeP55qE5ZKMPC9wPg==
- 提示2：PHA+55u45a+55Y6f5a2Q6LSo6YeP5YiG5Yir5Li677yaPGJyPjwvcD48cD5DYe+8mjQwJm5ic3A7Jm5ic3A7Jm5ic3A7IDxicj48L3A+PHA+Q++8mjEyPGJyPjwvcD48cD5P77yaMTY8YnI+PC9wPg==
- 答案：QQ==
PHA+56Kz6YW46ZKZ55qE5YyW5a2m5byP5Li6Q2FDTzxzdWI+Mzwvc3ViPu+8jOWug+eahOebuOWvueWIhuWtkOi0qOmHj+S4uu+8mjQwKzEyKzE2w5cz77ydMTAwPC9wPg==
本课配套习题挑战模式3/5
碳酸氢铵 NH4HCO3的相对分子质量
| A: 79 |
| B: 80 |
| C: 81 |
| D: 82 |
- 提示1：PHA+55u45a+55YiG5a2Q6LSo6YeP5piv5ZCE5YWD57Sg55u45a+55Y6f5a2Q6LSo6YeP55qE5ZKMPC9wPg==
- 提示2：PHA+55u45a+55Y6f5a2Q6LSo6YeP5YiG5Yir5Li677yaPC9wPjxwPk7vvJoxNDwvcD48cD5I77yaMTwvcD48cD5D77yaMTI8L3A+PHA+T++8mjE2PC9wPg==
- 答案：QQ==
PHA+MTQrMcOXNCsxKzEyKzE2w5czPTc5PGJyPjwvcD4=
本课配套习题挑战模式4/5
某元素的相对原子质量为27，其硝酸盐的相对分子质量为213，则该金属元素的化合价为
| A: +3 |
| B: +2 |
| C: +1 |
| D: -1 |
- 提示1：PHA+56Gd6YW45qC55Li6LTHku7fvvIzpgqPkuYjor6XnoZ3phbjnm5DkuIDlrprmmK/kuIDkuKrph5HlsZ7nprvlrZDlkozlh6DkuKrnoZ3phbjmoLnnprvlrZDnu4TlkIjogIzmiJDnmoTjgII8YnI+PC9wPg==
- 提示2：PHA+5oiR5Lus5oqK5pW05Liq56Gd6YW455uQ55qE55u45a+55YiG5a2Q6LSo6YeP5YeP5Y676L+Z5LiA5Liq6YeR5bGe56a75a2Q55qE55u45a+55Y6f5a2Q6LSo6YeP77yM5Ymp5LiL55qE5L6/5piv56Gd6YW45qC555qE6LSo6YeP44CCPGJyPjwvcD4=
- 答案：QQ==
PHA+56Gd6YW45qC5Tk88c3ViPjM8L3N1Yj48c3VwPi08L3N1cD7nmoTmgLvotKjph4/mmK8yMTMtMjc9MTg2PGJyPjHkuKpOTzxzdWI+Mzwvc3ViPjxzdXA+LTwvc3VwPueahOebuOWvueWIhuWtkOi0qOmHj+aYrzE0KzE2w5czPTYyPGJyPk5PPHN1Yj4zPC9zdWI+PHN1cD4tPC9zdXA+55qE5Liq5pWw5pivMTg2LzYyPTM8YnI+MeS4qumHkeWxnuW4puaciTPkuKpOTzxzdWI+Mzwvc3ViPjxzdXA+LTwvc3VwPu+8jE5PPHN1Yj4zPC9zdWI+PHN1cD4tPC9zdXA+5pivLTHku7fnmoTvvIzmiYDku6Xph5HlsZ7mmK8rM+S7tzwvcD4=
本课配套习题挑战模式5/5
下列物质的相对分子质量最大的是
| A: Fe3O4 |
| B: C2H5OH |
| C: CO(NH2)2 |
| D: Cu2(OH)2CO3 |
- 提示1：PHA+5YiG5Yir5rGC5Ye65ZCE6aG555qE55u45a+55YiG5a2Q6LSo6YeP6L+b6KGM5q+U6L6D5Y2z5Y+v44CCPGJyPjwvcD4=
- 提示2：PHA+55u45a+55Y6f5a2Q6LSo6YeP5YiG5Yir5Li677yaPGJyPjwvcD48cD5GZe+8mjU2PGJyPjwvcD48cD5P77yaMTY8YnI+PC9wPjxwPkPvvJoxMjxicj48L3A+PHA+SO+8mjE8YnI+PC9wPjxwPk7vvJoxNDxicj48L3A+PHA+Q3XvvJo2NDxicj48L3A+
- 答案：QQ==
PHA+QemhueS4ujIzMu+8jELpobnkuLo0Nu+8jEPpobnkuLo2MO+8jETpobnkuLoyMjLvvIzmlYXpgIlBPC9wPg==
