
DẠNG 7. TÍNH THEO PHƯƠNG TRÌNH HÓA HỌC. PHẦN 1 (KHTN8)

Interactive Video
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Chemistry
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8th Grade
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Hard
Teacher 9.2024
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Đốt cháy hoàn toàn 1,24 g phosphorus trong bình khí oxygen tạo thành oxide P2O5 .
Tính khối lượng P2O5 thu được.
5,68 gam
2,84 gam
1,42 gam
7,1 gam
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho 2, 479 L khí hydrogen (đkc) tác dụng với khí oxygen tạo thành nước. Khối lượng
nước thu được là
18 gam
1,8 gam
0,18 gam
0,9 gam
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho phương trình hóa học: CuO + H2SO4 → CuSO4 + H2O.Khi cho 1 mol CuO tác dụng với đủ với H2SO4 thu được x mol CuSO4 . Giá trị x là
0,5 mol
1 mol
2 mol
2,5 mol
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
0,2 mol
0,3 mol
0,4 mol
0,1 mol
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Đốt cháy hoàn toàn 7,5 gam than đá thành phần chính là carbon, còn lại chứa 4% tạp chất không cháy.
Thể tích khí oxi cần dùng (đktc) để đốt cháy hết lượng than đá trên ở đkc là
49,58 lít.
74,37 lít.
37,185 lít.
14,874 lít.
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