
Ôn tập Hóa 8 số 2
Authored by Nguyễn Long
Chemistry
8th Grade
Used 3+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phân tử khối của khí oxi là
16 đvC
64 đvC
8 đvC
32 đvC
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Oxi là nguyên tố phổ biến thứ mấy trong vỏ trái đất?
4
1
2
3
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tính chất nào sau đây không phải của khí oxi?
khí không màu
tan nhiều trong nước
không mùi
nặng hơn không khí
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nhiệt độ hóa lỏng của khí oxi là
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Khối lượng của 0,25 mol khí oxi là
4 gam
8 gam
16 gam
32 gam
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Số mol của 63,9 gam P2O5 là
0,45 mol
0,5 mol
0,3 mol
0,25 mol
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Thể tích ở đktc của 1,25 mol khí SO2 là
80 lít
40 lít
28 lít
8,4 lít
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