CĐ4-Tính theo PTHH
Quiz
•
Chemistry
•
1st - 5th Grade
•
Practice Problem
•
Medium
thieu thi
Used 14+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho phương trình BaCO3 → CO2 + BaO
Để điều chế 4,48 l CO2 thì khối lượng BaCO3 cần dùng là
1,97 gam
9,85 gam
19,7 gam
39,4 gam
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Zn + 2HCl → ZnCl2 + H2. Để thu được 40,8 g ZnCl2 cần bao nhiêu mol HCl
0,1 mol
0,15 mol
0,3 mol
0,6 mol
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cacbon cháy trong oxi hoặc trong không khí sinh ra cacbon đioxit CO2. Hãy tính thể tích (đktc) sinh ra là bao nhiêu, nếu có 8g khí O2 tham gia phản ứng
1,12 ml
2,24 l
2,8 ml
5,6 l
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho 1,2 g C cháy trong không khí thấy có khí làm vẩn đục nước vôi trong. Tính thể tích khí đó
1,12 ml
2,24 l
2,8 ml
5,6 l
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho phương trình sau: 4K + O2 → 2K2O.
Tính khối lượng chất tạo thành biết 7,8 g K
0,31 g
4,7 g
18,8 g
9,4 g
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho 2Al + 3H2SO4 → Al2(SO4)3 + 3H2. Tính thể tích H2 biết mAl = 16,2 g
6,72 l
8,96 l
13,44 l
20,16 l
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Đốt cháy hết 2,48 gam photpho theo phương trình: 4P + 5O2 → 2P2O5 thì cần thể tích khí O2 (đktc) tối thiểu là
5,60 lít
2,80 lít
2.24 lít.
22,4 lít
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