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Bui Le Phuong Uyen
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Nguyễn Hoàng Minh
23 tháng 11 2021 lúc 10:35

\(1,4Na+O_2\rightarrow^{t^o}2Na_2O\\ 2,4P+5O_2\rightarrow^{t^o}2P_2O_5\\ 3,3Fe+2O_2\rightarrow^{t^o}Fe_3O_4\\ 4,2H_2+O_2\rightarrow^{t^o}2H_2O\\ 5,N_2+H_2⇌^{\left(t^o,xt,p\right)}NH_3\\ 6,P_2O_5+3H_2O\rightarrow2H_3PO_4\\ 7,N_2O_5+H_2O\rightarrow2HNO_3\\ 8,2Al+6HCl\rightarrow2AlCl_3+3H_2\\ 9,2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\\ 10,2Cu+O_2\rightarrow^{t^o}2CuO\\ 11,CaO+2HNO_3\rightarrow Ca\left(NO_3\right)_2+H_2O\\ 12,Al\left(OH\right)_3+3HNO_3\rightarrow Al\left(NO_3\right)_3+3H_2O\\ 13,Zn+2HCl\rightarrow ZnCl_2+H_2\)

nhơ nhơ nhi
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Minh Phương
22 tháng 4 2023 lúc 19:50

Ca + H2\(\rightarrow\) Ca(OH)2 + H2

P2O5 + 3H2\(\rightarrow\) 2H3PO4 

2Al(OH)3 + 3H2SO4 \(\rightarrow\) Al2(SO4)3 + 6H2O

3Mg + 2AlCl\(\rightarrow\) 2Al + 3MgCl2

2KMnO4 + 16HCl \(\rightarrow\) 2KCl + 2MnCl2 + 5Cl2 + 8H2O

2Zn + O2 \(\rightarrow\) 2ZnO

3CO + Fe2O3 \(\rightarrow\) 2Fe + 3CO2

Nguyễn Hoàng Nam
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Ngô Quang Sinh
30 tháng 3 2018 lúc 8:01

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

Bruh
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๖ۣۜHả๖ۣۜI
20 tháng 1 2022 lúc 20:19

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

\(V_{H_2}=0,17.22,4=3,808\left(l\right)\)

\(m_{NaOH}=0,17.40=6,8\left(g\right)\)

 

Đỗ Tuệ Lâm
20 tháng 1 2022 lúc 20:19

nó dễ mà nó dài ghê

Kudo Shinichi
20 tháng 1 2022 lúc 20:21

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Phạm Anh Nguyên
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hami
4 tháng 5 2022 lúc 13:50

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)

Kinomoto Sakura
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Phạm Trần Hoàng Anh
1 tháng 3 2021 lúc 16:25

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………….

Lê Trang
1 tháng 3 2021 lúc 16:30

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

Nguyễn Bảo Khánh
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Nguyễn Ngọc Khánh Huyền
1 tháng 12 2021 lúc 18:44

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.

Cao Tùng Lâm
1 tháng 12 2021 lúc 18:44

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.

Bùi Nguyễn Đại Yến
1 tháng 12 2021 lúc 18:45

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.

 

Lệ Quyên
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Anh Quynh
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