Buổi 1 - Câu Hỏi Trắc Nghiệm Hóa Học
Quiz
•
Chemistry
•
10th Grade
•
Practice Problem
•
Medium
Ms Nhung Hoàng
Used 1+ times
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30 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nguyên tử khối của nguyên tố S (lưu huỳnh) là:
16
23
32
35,5
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hóa trị của nguyên tố Natri (Na) là:
I
II
III
IV
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phân tử khối của MgCO₃ là:
40
84
56
74
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Công thức tính số mol là:
n = m : M
n = M : m
n = V × 22,4
n = M × m
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho biết m = 19,6g và M = 98 (H₂SO₄), số mol là:
0,1 mol
0,2 mol
0,5 mol
1 mol
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tính thể tích khí CO₂ (đktc) có số mol n = 0,25 mol:
6,1975 lít
24,79 lít
12,5 lít
22,4 lít
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nhóm nào sau đây gồm toàn các đơn chất?
O₂, H₂SO₄, Na
O₂, S, P
FeSO₄, Cl₂, KOH
HCl, Mg, CuSO₄
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