
八下自然1-3(yck)
Authored by 葉 進坤
Chemistry, Science
8th Grade
Used 5+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
碳在氧氣中燃燒的化學反應式為:C+O2→CO2。若取24公克的碳使其完全燃燒,會得到下列何種結果?
生成2莫耳的二氧化碳
生成44公克的二氧化碳
消耗1莫耳的氧氣
消耗32公克的氧氣
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
已知氫氣燃燒產生水的化學反應式為:
2H2+O2→2H2O
則下列哪一個圖示可用來說明此反應式?
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
化學反應是原子重新排列組合形成新物質的過程,若附圖中○與●分別代表兩種不同的原子,則此圖用來表示哪一個反應最適當?
2O2+N2→2NO2
2C+O2→2CO
N2+O2→2NO
2CO+O2→2CO2
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
今有甲、乙、丙三種物質,已知三者分子量分別為10、20、30。若甲和乙反應生成丙,則下列何者可能為其平衡反應式?
甲+乙→丙
2甲+乙→2丙
甲+2乙→2丙
3甲+2乙→2丙
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
將鎂在空氣中燃燒前後的質量關係繪製如附圖,鎂3公克完全燃燒後,會產生白色粉末多少公克?
3
5
6
7
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
氫分子與氮分子反應產生氨分子,其反應式為:
N2+3H2→2NH3,
若將28公克的氮分子與12克的氫分子混合反應,請問最多可以產生多少公克的氨分子?
(原子量:N=14、H=1)
68
40
34
17
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
甲和乙反應產生丙,結果如附圖,則甲、乙、丙總共含有幾種原子?(●及○分別代表不同的原子)
4
3
2
1
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