
KHTN 8
Authored by Trang Nguyen
Science
2nd Grade
Used 1+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Điền hệ số tương ứng lần lượt vào phương trình sau: Al +O2 -> Al2O3.
4:2:3
5:2:3
1:1:1
2:3:4
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Điền hệ số tương ứng lần lượt vào phương trình sau : H2 + O2 -> H2O
2:2:3
2:1:2
1:1:1
1:2:2
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Điền hệ số tương ứng lần lượt vào phương trình sau : CaCO3 -> CaO + CO2
1:1:1
2:2:4
4:3:2
1:2:2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Điền hệ số tương ứng lần lượt vào phương trình sau : Cu + O2 -> CuO
1:2:2
2:3:1
2:3:2
2:1:2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Điền hệ số tương ứng lần lượt vào phương trình sau : Mg + Cl2 -> MgCl2
1:1:1
2:5:4
1:1:2
2:1:1
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Điền hệ số tương ứng lần lượt vào phương trình sau : K + O2 -> K2O
4:1:2
1:2:4
1:1:2
2:1:1
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Điền hệ số tương ứng lần lượt vào phương trình sau : N2 + H2 -> NH3
1:1:1
1:3:2
3:1:2
2:1:1
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