test1
Quiz
•
Chemistry
•
8th Grade
•
Practice Problem
•
Medium
洪菁穗 洪菁穗
Used 3+ times
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26 questions
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1.
MULTIPLE SELECT QUESTION
2 mins • 1 pt
已知鎂與鹽酸反應生成氫氣與氯化鎂,若反應物中有50個氯原子,則生成物中有多少個氯原子?
15
25
50
100
2.
MULTIPLE SELECT QUESTION
2 mins • 1 pt
6公克的木炭燃燒後生成22公克的二氧化碳,則9公克的木炭完全燃燒須和多少公克的純氧反應?
6
9
18
24
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
6. 硫酸銨的化學式為(NH4)2SO4,取一含純硫酸銨的樣品進行分析,得知其中有氧16莫耳,則此樣品含氮之莫耳數為下列何者?
(A)8 (B)4 (C)2 (D)1。
8
4
2
1
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
9. 某非金屬氧化物XO2的分子量是46,則X為下列哪一個元素? (A)S (B)C (C)N (D)H。
S
C
N
H
5.
MULTIPLE SELECT QUESTION
2 mins • 1 pt
10. 已知3公克的甲化合物恰可與3公克的乙化合物完全反應並生成6公克的丙化合物。若取10公克的甲化合物和5公克的乙化合物進行反應,則下列敘述何者正確?
(A)反應時,10 g的甲化合物剛好用完
(B)反應完成後,生成5 g的丙化合物
(C)反應完成後,還剩下2 g的甲化合物
(D)反應完成後,物質的總質量為15 g。
6.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
11. X為金屬元素M及氧的化合物,已知M的原子量為56,氧的原子量為16,若32公克的化合物X中含有氧9.6公克,則X的化學式為何?
(A)MO
(B)M2O
(C)M2O3
(D)M3O4
7.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
24. A、B、C代表某三種元素,AO、BO、CO3為其氧化物,如有下列反應發生:B+AO→BO+A;3B+CO3→C+3BO,則哪一種元素的活性最大?
(A)A
(B)B
(C)C
(D)三者相等。
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