Tổng ôn kiến thức hóa 8
Quiz
•
Chemistry
•
9th Grade
•
Practice Problem
•
Medium
Nhật Lý
Used 3+ times
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50 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hạt nhân nguyên tử được tạo bởi
Proton
Electron và nơtron
Electron
Proton và nơtron
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phân tử khối của hợp chất NO2 là
46
44
30
48
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho các chất có công thức hóa học sau: Al, Al2O3, Fe(OH)3, KClO3, O2, N2. Số đơn chất là:
2
3
1
4
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nguyên tử Mg nặng hay nhẹ hơn, bao nhiêu lần so với nguyên tử cacbon
2 lần
1 lần
0,5 lần
1,5 lần
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hợp chất Fe(NO3)x có phân tử khối là 242 đvC. Giá trị của x là
2
3
1
4
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cách hợp lí nhất để tách muối từ nước biển là
Lọc
Chưng cất
Bay hơi
Để yên để muối lắng xuống gạn đi
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nguyên tử khối là khối lượng của một nguyên tử tính bằng đơn vị nào?
Gam
Kilôgam
Đơn vị cacbon (đvC)
Cả 3 đơn vị trên
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