
Kiểm tra 15 phút
Quiz
•
Science
•
8th Grade
•
Practice Problem
•
Hard
LAN LTV
Used 3+ times
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Nước được tạo ra từ nguyên tử của các nguyên tốc hóa học nào?
Carbon và oxygen
Hydrogen và oxygen
Nitrogen và oxygen
Hydrogen và nitrogen
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Sulfur là gì trong phản ứng sau:
Iron + Sulfur => Iron (II) sulfide
Chất xúc tác
Chất tham gia phản ứng
Sản phẩm
Không có vai trò gì trong phản ứng
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Công thức tính số mol của một chất
n = m/M
n = mxM
n = M/m
n = M.V
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Khối lượng mol kí hiệu là gì?
N
M
m
mol
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Khi hòa tan dầu ăn trong cốc xăng thì xăng đóng vai trò gì?
Chất tan
Chất chưa bão hòa
Chất bão hòa
Dung môi
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Hòa tan CuSO4 40% trong 90 gam dung dịch. Số mol cần tìm là
0,225 mol
0,22 mol
0,25 mol
0,52 mol
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Khi tính toán theo phương trình hóa học, cần thực hiện mấy bước cơ bản?
1 bước
2 bước
3 bước
4 bước
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