ʙỏ đı ɱà Ļàm Nqườɪ Ŋɧóɕ çŏŋ À :3
Cân bằng các phương trình hóa học sau: 1) Na + O2 à Na2O 2) P + O2 à P2O5 3) Fe + O2 à Fe3O4 4) H2 + O2 à H2O 5) N2 + H2 à NH3 6) P2O5 + H2O à H3PO4 7) N2O5 + H2O à HNO3 8) Al + HCl à AlCl3 + H2 9) Al + H2SO4 à Al2(SO4)3 + H2 10) ?Cu + ? à 2CuO 11) CaO + ?HNO3 à Ca(NO3)2 à + ? 12) Al(OH)3+ ?HNO3 à ? + H2O 13) Zn + ?HCl à ? + H2 Giúp mình với mọi người ơi!!
\(1,4Na+O_2\rightarrow^{t^o}2Na_2O\\ 2,4P+5O_2\rightarrow^{t^o}2P_2O_5\\ 3,3Fe+2O_2\rightarrow^{t^o}Fe_3O_4\\ 4,2H_2+O_2\rightarrow^{t^o}2H_2O\\ 5,N_2+H_2⇌^{\left(t^o,xt,p\right)}NH_3\\ 6,P_2O_5+3H_2O\rightarrow2H_3PO_4\\ 7,N_2O_5+H_2O\rightarrow2HNO_3\\ 8,2Al+6HCl\rightarrow2AlCl_3+3H_2\\ 9,2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\\ 10,2Cu+O_2\rightarrow^{t^o}2CuO\\ 11,CaO+2HNO_3\rightarrow Ca\left(NO_3\right)_2+H_2O\\ 12,Al\left(OH\right)_3+3HNO_3\rightarrow Al\left(NO_3\right)_3+3H_2O\\ 13,Zn+2HCl\rightarrow ZnCl_2+H_2\)
Hoàn thành các phương trình hóa học
Ca + H2O à
P2O5 + H2Oà
Al(OH)3 + H2SO4 à
Mg + AlCl3 à
KMnO4 + HCl à
Zn + O2 à
CO + Fe2O3 à
Ca + H2O \(\rightarrow\) Ca(OH)2 + H2
P2O5 + 3H2O \(\rightarrow\) 2H3PO4
2Al(OH)3 + 3H2SO4 \(\rightarrow\) Al2(SO4)3 + 6H2O
3Mg + 2AlCl3 \(\rightarrow\) 2Al + 3MgCl2
2KMnO4 + 16HCl \(\rightarrow\) 2KCl + 2MnCl2 + 5Cl2 + 8H2O
2Zn + O2 \(\rightarrow\) 2ZnO
3CO + Fe2O3 \(\rightarrow\) 2Fe + 3CO2
Cho các phản ứng hóa học sau:
(1) (NH4)2SO4 + BaCl2 à
(2) CuSO4 + Ba(NO3)2 à
(3) Na2SO4 + BaCl2 à
(4) H2SO4 + BaSO3 à
(5) (NH4)2SO4 + Ba(OH)2 à
(6) Fe2(SO4)3 + Ba(NO3)2 à
Các phản ứng đều có cùng một phương trình ion rút gọn là
A. (1), (2), (3), (6).
B. (3), (4), (5), (6).
C. (2), (3), (4), (6).
D. (1), (3), (5), (6).
Chọn đáp án A
Cả 4 phản ứng (1), (2), (3), (6) đều có cùng phương trinh ion rút gọn là: Ba2+ + S O 4 2 - à BaSO4
(4) không cùng phương trình ion rút gọn vì có tạo khí SO2
(5) không cùng phương trình ion rút gọn vì có tạo khí NH3
Bài 1: Hoàn thành các PTHH sau đây:
1. 4Na + O2 à 2Na2O
2. Ba + 2H2O à Ba(OH)2 + H2
3. P2O5 + 3H2O à 2H3PO4
4. 2Al + 6HCl à 2AlCl3 + 3H2
5. CuO + H2 à Cu + H2O
6. 2H2 + O2 à 2H2O
7. Mg(OH)2 + 2HNO3 à Mg(NO3)2 + 2H2O
8. Fe2O3 + 3H2SO4 à Fe2(SO4)3 + 3H2O
Bài 2: Natri tác dụng với Nước sau phản ứng thu được dung dịch Natri hiđroxit và khí Hiđro.
Nếu có 9,2 gam Nhôm tham gia phản ứng, em hãy tìm:
a. Thể tích khí Hiđro thu được ở đktc.
b. Khối lượng NaOH thu được sau phản ứng.
Bài 3: Đốt cháy hoàn toàn 6,4 gam Đồng trong bình chứa 0,896 lít khí O2 ở đktc. Sau phản ứng thu được Đồng (II) oxit (CuO).
a. Sau phản ứng chất nào còn dư và dư bao nhiêu gam.
b. Tính khối lượng CuO thu được sau phản ứng.
Giup tui voi tui can gap cam on moi nguoi
Bài 2 :
a) \(n_{Al}=\dfrac{9,2}{27}=0,34\left(mol\right)\)
\(PTHH:2Na+2H_2O->2NaOH+H_2\)
0,17 0,17 0,17 0,17
\(V_{H_2}=0,17.22,4=3,808\left(l\right)\)
\(m_{NaOH}=0,17.40=6,8\left(g\right)\)
1. This/most boring/film/I/ever/watch/.à……………………………………..
2. We/feel/satisfy/ending/this/movie/.à……………………………………..
3. I/ used / play / games / twice a week. à……………………………………..
3. In spite/have/good critics/this film/make/me/disappoint/.à……………………………………..
4. The movie/boring/so/we/left/halfway/it/.à……………………………………..
5. Although/there/many/famous/actors/the movie/plot/uninteresting/.à……………………………………..
6. I / use/ wash/ clothes/ hand/ the past.à……………………………………..
7. We/ feel / satisfy/ ending/ this movie.à……………………………………..
8. I / go / see / film / feel / tired.à……………………………………..
9. He / live / country / he / child.à……………………………………..
10.They found the journey to the USA very tiring.
à The journey to the USA made………………..………….
t
1. This/most boring/film/I/ever/watch/
This is the most boring film I have ever watched
2. We/feel/satisfy/ending/this/movie/.
We feel satisfied with the ending of this movie
3. I/ used / play / games / twice a week.
I used to playing games twice a week.
3. In spite/have/good critics/this film/make/me/disappoint/.
In spite of having critics,this film make me disappointed.
4. The movie/boring/so/we/left/halfway/it/
the movie was boring so we left halfway it.
5. Although/there/many/famous/actors/the movie/plot/uninteresting/
Although there are many the most famous actors,its plot is uninteresting.
6. I / use/ wash/ clothes/ hand/ the past.
I used to washed clothes by hand in the past.
7. We/ feel / satisfy/ ending/ this movie
We feel satisfied with the ending of this movie
8. I / go / see / film / feel / tired
I go to see the film despite feeling really tired.
9. He / live / country / he / child
He lived in the country when he was a child.
10.They found the journey to the USA very tiring.
(không biết)
1. Where does Mrs Hoa go every morning?
à……………………………………………………
2. What does she buy for her husband?
à…………………………………………………………
3. What did her husband tell her?
à………………………………………………………
4. Do you like watermelon?
à………………………………………………….
1. Where does Mrs Hoa go every morning?
………She goes to her office ………
2. What does she buy for her husband?
………She buy a bike for her husband………
3. What did her husband tell her?
………He tell her to invite some friend come to thier house…………
4. Do you like watermelon?
…………Yes, I do. I love it so much………….
Câu hỏi này ở phần bài đọc! Lúc nãy mình đã có làm, bạn qua ''đây'' để xem thử nhé! :)
II. Answer the questions:
1. Where does Mrs Hoa go every morning?
-> Mrs Hoa goes to the market every morning.
2. What does she buy for her husband?
-> Watermelon.
3. What did her husband tell her?
-> He told her that he wants to put some watermelon seeds in the soil to grow watermelon plants.
4. Do you like watermelon?
-> Yes, I do.
1. Where does Mrs Hoa go every morning?
She goes to her office
2. What does she buy for her husband?
She buy a bike for her husband
3. What did her husband tell her?
He tell her to invite some friend come to thier house
4. Do you like watermelon?
Yes, I do. I love it so much
1. to/ book/ Mike/ This/ belongs/.
à .
2. bigger/ An/ is/ bear/ than/ elephant/a/.
à .
3. easily/ learns/ Kien/ quickly/ things/ and/.
à .
4. should/ the door/ You/ before/ knock/ entering/.
à
1. This book belongs to Mike.
2. An elephant is bigger than a bear.
3. Kien learns things quickly and easily.
4. You should knock the door before entering.
1. This book belongs to Mike.
2. An elephant is bigger than a bear.
3. Kien learns things quickly and easily.
4. You should knock the door before entering.
1. This book belongs to Mike.
2. An elephant is bigger than a bear.
3. Kien learns things easily and quickly.
4. You should knock the door before entering.
Bài 1: Hoàn thành chuỗi sản xuất sau:
a. S à SO2 à SO3 à H2SO4 à MgSO4.
b. Ba à BaOà Ba(OH)2 à BaCl2.
Bài 2. Nhận biết các dung dịch sau đựng trong các lọ không dán nhãn: HCl, H2SO4, NaCl, Na2SO4.
Bài 3: Cho 11,2g sắt vào 50ml dung dịch HCl.
a. Viết phương trình? Nêu hiện tượng của phản ứng?
b. Tính khối lượng muối Iron (II) chloride ( FeCl2) đã phản ứng?
c. Tính nồng độ mol/ lít của dung dịch HCl đã dùng?
d. Tính thể tích khí ở điều kiện chuẩn( p = 1bar, to = 25oC).
Biết tại điều kiện chuẩn này 1 mol khí = 24,79 lít.
(Fe = 56, H = 1, Cl = 35,5 )
Change these sentences into the passive voice:
1. Where did you leave your bike?
à ………………..
2. Who defeated the champion?
à ………………..
3. No one has found the missing boy.
à ………………..
4. Nobody protects the tower well.
à ………………..
5. The storm didn’t kill anyone.
à ………………..
6. The children began beating the cat.
à ………………..
7. Nothing will affect the result of the competition.
à ………………..
8. She needs to clean the floor. (làm theo 2 cách)
à ………………..
à ………………..
9. They don’t need to paint the house.
à The house needn’t ………………..
10. Her parents expect her to study well.
à ………………..
11. The boss is asking me to find his document.
à ………………..
12. We will force the villagers to work hard.
à ………………..
13. His father always makes him swim in cold water.
à ………………..
14. They didn't allow us to pass the river.
à ………………..
15 Many people watched some eagles flying in the sky.
à ………………..
16. Jack noticed his father leave home.
à ………………..
17. He expected me to buy him a book.
à ………………..
18. They allowed women to vote many years ago.
à ………………..
19. They suggested making the test easier.
à ………………..
20. They think she is the most beautiful girl.
à ………………..
21. It’s your duty to make tea for the party.
à ………………..
22. They let their children go to the zoo last Sunday.
à ………………..
23. He had the neighbor mend the chair.
à ………………..
24. The walls need painting.
à ………………..
25. He made me clean all the plates last night.
à ………………..
26. Don’t close the door.
à ………………..