
莫耳數
Quiz
•
Chemistry
•
8th Grade
•
Practice Problem
•
Medium
Carrie Kan
Used 2+ times
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12 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列各分子的分子量中,何者錯誤?(N=14,Ca=40,K=39,Na=23)
NH3=17
NaHCO3=101
NaOH=40
KNO3=101
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
試問有關C6H12O6的敘述,下列何者錯誤?
此為某物質的分子式
C、H、O表示組成該物質的原子種類
H右下方數字12表示1分子中H原子的數目
由此符號可知C原子、H原子、O原子的質量比為1:2:1
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
過錳酸鉀(KMnO4)1 莫耳含有多少個氧原子數?
3.6×1024 個
4.8×1024 個
2.4×1024 個
1.2×1024 個
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
下列選項中何者與 CO2 的分子量相同?(原子量:H=1、C=12、N=14、O=16)
C3H8
H2O
C2H6
NO2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
若科學家決議將C的原子量改訂為24,下列敘述何者不正確?
一個C原子的實際質量將變為2倍
H的原子量為2
水分子的分子量為36
CO2的分子量將變為原來的2倍
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
下列甲、乙、丙三種物質,其質量大小關係應該為何?
甲.2莫耳的H2O;
乙.6×1023個O2;
丙.22公克的CO2。
乙>丙>甲
丙>甲>乙
丙>乙>甲
甲>乙>丙
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
已知原子量:C=12、H=1、O=16、Na=23,S=32。在下列已知的物質中,哪一個的分子量最大?
C4H10
Na2SO4
Na2S2O3
NaHCO3
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