
Tính theo PTHH
Authored by Nguyen Hong
Chemistry
7th - 8th Grade
Used 19+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Theo phương trình phản ứng: 4Al + 3O2 ---> 2Al2O3
Để phản ứng với 5,4 gam nhôm cần số mol khí oxygen là
0,3 mol
0,15 mol
0,2 mol
0,27 mol
2.
MULTIPLE CHOICE QUESTION
0 sec • 1 pt
Theo phương trình phản ứng: 4Al + 3O2 ---> 2Al2O3
Từ 2,7 gam nhôm sinh ra khối lượng Al2O3 là
5,1 gam
10,2 gam
20,4 gam
40,8 gam
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Theo phương trình phản ứng: 4Al + 3O2 ---> 2Al2O3
Để tạo thành 20,4 gam Al2O3 cần số mol khí oxygen là
0,2 mol
0,1 mol
0,6 mol
0,3 mol
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Theo phương trình phản ứng: 4Al + 3O2 ---> 2Al2O3
Để điều chế 6,12 gam Al2O3 cần số gam nhôm là
2,7 gam
1,62 gam
3,24 gam
5,4 gam
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Theo phương trình phản ứng: CaCO3 + ___HCl ---> CaCl2 + CO2 + H2O
Để phản ứng với 3,5 gam CaCO3 cần số mol HCl là
0,035
0,0175
0,07
0,14
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Theo phương trình phản ứng: CaCO3 + ___HCl ---> CaCl2 + CO2 + H2O
Từ 3,5 gam CaCO3 có thể thu được khối lượng khí CO2 là
13,2 gam
0,035 gam
1,54 gam
15,4 gam
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Theo phương trình phản ứng: CaCO3 + ___HCl ---> CaCl2 + CO2 + H2O
Để điều chế 2,479 lít khí CO2 (đkc) cần số gam CaCO3 là
100 gam
50 gam
25 gam
10 gam
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