質量守恆002_練習題2
Quiz
•
Science
•
7th - 9th Grade
•
Medium
鄭之偉 鄭之偉
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪一個物質在空氣中加熱之後,殘留物質的質量將減少?
小蘇打
鋼絲絨
鎂粉
銅片
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
燃燒後的蠟燭,質量會變輕,其原因為何?
不遵守質量守恆定律
燃燒後的部分產物散失到空氣中
蠟燭燃燒為化學變化
蠟燭並非純物質
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
取質量不等的銅粉在空氣中加熱,全部銅粉均變成黑色後,稱其總質量,結果如附圖所示,則2公克的銅可與多少公克的氧化合?
0.5公克
0.75公克
1.5公克
2.5公克
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
道耳頓的原子說提到:「化學反應僅是原子排列方式改變」,此可以說明下列哪一個定律?
虎克定律
牛頓定律
定比定律
質量守恆定律
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在密閉容器內置入40公克碳酸鈉水溶液及20公克氯化鈣水溶液,反應後會生成碳酸鈣沉澱與氯化鈉,此時密閉容器內物質總質量應為多少?
20公克
30公克
40公克
60公克
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
將12公克的碳完全燃燒後,生成44公克新物質,試問有多少公克的氧參與反應?
8
16
24
32
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
8公克甲物質恰與20公克乙物質完全反應,其反應方程式為:2甲+乙→3丙,則產生的丙物質為多少公克?
24
28
36
48
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