10分鐘小測：第12章 反應質量
10th - 12th Grade
•8 Qs
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10分鐘小測：第12章 反應質量
Quiz
•
Chemistry
•
10th - 12th Grade
•
Practice Problem
•
Hard
Chemistry Aristo
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8 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
11.5 g的乙醇(C₂H₅OH)含有多少個碳原子？
(相對原子質量：H = 1.0、C = 12.0、O = 16.0；亞佛加德羅常數 = 6.02 × 10²³ mol⁻¹)
A. 1.51 × 10²³
B. 3.01 × 10²³
C. 6.02 × 10²³
D. 1.20 × 10²⁴
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
若6.0 g的一氧化氮(NO)含n個分子，那麼3.0 g的氮(N₂)含有多少個分子？
(相對原子質量：N = 14.0、O = 16.0)
A. 0.021n
B. 0.20n
C. 0.30n
D. 0.55n
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
多少摩爾的二氧化硫含y個氧原子？
(L代表亞佛加德羅常數。)
A. y/L
B. L/y
C. y/2L
D. 2y/L
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
假設20滴溴的總體積是1.0 cm³，在一滴溴中分子的數目是多少？
(亞佛加德羅常數 = 6.02 × 10²³ mol⁻¹；溴的密度 = 3.12 g cm⁻³；相對原子質量：Br = 79.9)
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
元素Y的相對原子質量是31.0。它生成一個氧化物，所含氧的質量百分比是56.3%，該氧化物的實驗式是甚麼？
(相對原子質量：O = 16.0)
A. YO₂
B. YO₃
C. Y₂O₃
D. Y₂O₅
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
金屬M可生成一種帶+2電荷的簡單離子。用氫完全還原50.22 g的這氧化物生成金屬M和4.05 g的水。M的相對原子質量是多少？
(相對原子質量：O = 16.0)
A. 63.5
B. 158.7
C. 207.2
D. 221.2
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
考慮以下的反應：
H₂O₂(aq) + 2I⁻(aq) + 2H⁺(aq) → I₂(aq) + 2H₂O(l)
在這反應中，生成的I₂分子的數目相等於
A. 所消耗I⁻離子數目的兩倍。
B. 所消耗H₂O₂分子數目的一半。
C. 所消耗H⁺離子數目的一半。
D. 所生成H₂O分子數目的兩倍。
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