
PHƯƠNG TRÌNH HÓA HỌC
Authored by tran linh
Chemistry
1st - 9th Grade
Used 4+ times

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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Công thức hóa học của khí hidro là:
H
2H
H2
H2.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chọn đáp án đúng
4P + 5O2 - > P2O5
4P + O2 - > P2O5
4P + 5O2 - > 2P2O5
6P + 5O2 - > 3P2O5
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chọn công thức thích hợp điền vào dấu ?. Trong PTHH sau:
2Cu + ? -> CuO
O2
O
2O
O2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho 9 (g) nhôm cháy trong không khí thu được 10,2 g nhôm oxit. Tính khối lượng oxi?.
1,7 g
1,6 g
1,5 g
1,2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho nhôm (Al tác dụng với axit sunfuaric(H2SO4) thu được muối nhôm sunfat ( Al2(SO4)3) và khí H2. Phương trình phản ứng nào sau đây đã viết đúng?
Al + H2SO4 -> Al2(SO4)3 + H2
2Al + H2SO4 -> Al2(SO4)3 + H2
Al + 3H2SO4 -> Al2(SO4)3 + 3H2
2Al + 3H2SO4 -> Al2(SO4)3 + 3H2
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