
國中自然2下ch1-3反應式與化學計量
Authored by 翰林出版國中自然 翰林出版國中自然
Chemistry
8th Grade
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8 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
二氧化碳生成的化學反應式如下:C+O2→ CO2,由此反應式可推知下列何種資訊?
化學反應的速率
各物質反應的濃度大小
各物質反應時的質量比
反應進行所需要的溫度
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
化學反應式的係數,代表參加反應的反應物及生成物之間的什麼關係?
莫耳數比
質量比
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
設X、Y、Z分別代表三種相異元素,若下列為已平衡之化學反應式:XZ2+2Y→2甲+X,則依據道耳頓原子說,甲的化學式為下列何者?
YZ
YZ2
Y2Z
Y2Z2
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
一般的化學反應:(甲)原子不滅;(乙)性質不變;(丙)總質量不變;(丁)分子不變;(戊)左右係數相等,正確者有哪些?
甲丙
甲丙戊
甲丙丁
甲乙丙
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
已知X、Y、Z均為純物質,X的分子量為24,Y的分子量為 32,且2X+Y→2Z,則Z的分子量為下列何者?
20
30
40
80
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
在CaCl2+NaOH → Ca(OH)2+NaCl 的反應式中,平衡的係數總和為多少?
4
5
6
7
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
如圖為甲、乙、丙三種分子的結構示意圖,甲、乙兩種分子可反應生成丙分子,若要生成 10 個丙分子,至少需要多少個甲分子和乙分子?
甲分子 5 個和乙分子 5 個
甲分子 5 個和乙分子 10 個
甲分子 10 個和乙分子 5 個
甲分子 10 個和乙分子 10 個
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