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Authored by Minh Ngọc
Science
8th Grade
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5 questions
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1.
OPEN ENDED QUESTION
30 sec • 20 pts
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Answer explanation
H2S và H3PO4
2.
OPEN ENDED QUESTION
3 mins • 20 pts
Thang pH dùng để làm gì?
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Answer explanation
Biểu thị độ acid, base của một dung dịch
3.
OPEN ENDED QUESTION
3 mins • 20 pts
Cho 3,6 gam magnesium tác dụng với dung dịch hydrochloric acid loãng thu được bao nhiêu lít khí H2 ở điều kiện chuẩn (25oC, 1 bar)?
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Answer explanation
3,7185 lít
4.
OPEN ENDED QUESTION
30 sec • 20 pts
Nêu hiện tượng xảy ra khi cho viên kẽm vào dung dịch sulfuric acid.
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5.
OPEN ENDED QUESTION
30 sec • 20 pts
Hoà tan hết 3,6 g một kim loại hoá trị II bằng dung dịch H2SO4 loãng được 3,7185 lít H2 (đktc). Xác định kim loại đó
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