
Câu hỏi Hóa học
Quiz
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Others
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1st Grade
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Medium
Nguyễn Thiên Phúc undefined
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35 questions
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1.
OPEN ENDED QUESTION
3 mins • 1 pt
Cho sơ đồ phản ứng hóa học sau: Fe + HCl ⇢ FeCl2 + H2 a) Lập phương trình hóa học của phản ứng trên
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2.
OPEN ENDED QUESTION
3 mins • 1 pt
b) Tính thể tích khí H2 (ở điều kiện chuẩn) thu được khi hòa tan 5,6 gam sắt trong dung dịch HCl.
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3.
OPEN ENDED QUESTION
3 mins • 1 pt
c) Tính nồng độ phần trăm dung dịch HCl đã dùng biết rằng khối lượng dung dịch HCl là 20 gam.
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4.
OPEN ENDED QUESTION
3 mins • 1 pt
Câu 26. Hoàn thành phương trình hóa học sau a/ Mg + ............... → MgSO4 + Cu↓ b/ Cu + AgNO3→ ............... + ............... c/ Mg(NO3)2 + ............... → Mg(OH)2↓ + ............... d/ Mg(OH)2 + ............... → MgCl2 + ...............
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5.
OPEN ENDED QUESTION
3 mins • 1 pt
Câu 27. Vì sao các mũi đinh đều được làm nhọn
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6.
OPEN ENDED QUESTION
3 mins • 1 pt
Câu 1. Cho các oxide: Na2O, Fe2O3, CuO, P2O5, SO2
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7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 1. Cho các oxide: Na2O, Fe2O3, CuO, P2O5, SO2. Có bao nhiêu oxide acid?
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