下列哪項或哪些陳述是正確的?
(1) 物質的摩爾質量是一摩爾該物質的質量 (以公斤為單位)。
(2) 一摩爾氧氣所含的原子數目相等於一摩爾氮氣的原子數目。
(3) 一摩爾氧氣的質量相等於一摩爾氮氣的質量。
S.4 Chapter 12 Reacting mass
Quiz
•
Chemistry
•
10th Grade
•
Hard
Lai Cheung
Used 2+ times
FREE Resource
8 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪項或哪些陳述是正確的?
(1) 物質的摩爾質量是一摩爾該物質的質量 (以公斤為單位)。
(2) 一摩爾氧氣所含的原子數目相等於一摩爾氮氣的原子數目。
(3) 一摩爾氧氣的質量相等於一摩爾氮氣的質量。
只有(1)
只有(2)
只有(1)和(3)
只有(2)和(3)
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪種物質含有最多原子?
(相對原子質量︰H = 1.0、Ne = 20.2、
Mg = 24.3、Cu = 63.5)
2.0 g氫
24.3 g鎂
30.3 g氖
31.8 g銅
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
若2 g氦氣含有y個分子,38 g氟氣含有多少個分子?
(相對原子質量︰He = 4.0、F = 19.0)
1/2y
y
2y
4y
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Na2CO3․H2O中結晶水的質量百分比是多少?
(相對原子質量︰H = 1.0、C = 12.0、
O = 16.0、Na = 23.0)
A. 13.0%
B. 13.5%
C. 14.0%
D. 14.5%
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
某鐵礦石中Fe3O4的質量百分比是70%,從100 g鐵礦石中可提取的鐵的質量是多少?
(相對原子質量︰O = 16.0、Fe = 55.8)
A. 16.9 g
B. 24.1 g
C. 50.6 g
D. 72.3 g
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
金屬X的相對原子質量是40.1。把金屬X在空氣中燃燒,會生成一種氧化物。已知8.42 g金屬X氧化物含有2.40 g氧。計算氧化物中X和氧的摩爾比。
(相對原子質量︰O = 16.0)
A. 1︰1
B. 1︰2
C. 2︰1
D. 1︰3
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
若20.0 g水完全分解成氫和氧,所生成氣體的總質量是多少?
(相對原子質量︰H = 1.0、O = 16.0)
A. 1.11 g
B. 2.22 g
C. 17.8 g
D. 20.0 g
8.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
碳酸鈣受熱時分解成生石灰 (氧化鈣) 和二氧化碳。
10.01 g碳酸鈣完全分解,生成的氧化鈣的質量是5.61g。
若反應最終生成4.31 g的氧化鈣,反應的百分產率是多少?
A. 44.8%
B. 59.8%
C. 76.8%
D. 89.0%
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