
hoahk1
Authored by Lương Hồng
Chemistry
1st Grade
40 Questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Tỉ khối của khí metan CH4 đối với khí hydro là:
. 1,0
0.8
0.5
8.0
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Một bình chứa hỗn hợp khí X gồm: 11,2 lit khí oxi và 2,24 lit khí cacbondioxit ở đktc. Tổng khối lượng các khí trong X là:
20,4g
10,6g
6,0g
7,6g
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
kim loại X nặng hơn khí H2 là 32 lần. X là:
Fe
Cu
Zn
Mn
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Khối lượng của 2,24 lit CH4 ( đktc) là:
16g
1,6g
1,0g
11,2g
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
thể tích (đktc) của 9.1023 phân tử H2S là:
6,72
3,36 l
22,4
33,6
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Trong hợp chất Fe2(SO4)3 thì sắt có thành phần % về khối lượng là:
28,0%
73,7%
36,8%
48,0%
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Một hợp chất A có khối lượng mol là 120g, thành phần các nguyên tố 20% Mg; 26,67%S; 53,33%O. A là:
MgSO
MgSO3
MgSO2
MgSO4
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