Tìm các chất+ `X_1;X_2;X_3;....` thích hợp hoàn thành các phản ứng sau: 1, `Fe_2O_3+CO->Fe_xO_y+X_1` 2, `X_2+X_3->BaSO_4\downarrow+Na_2SO_4+CO_2\uparrow+H_2O` 3, `X_2+X_4->BaSO_4\downarrow+Na_2SO_4+CO_2\uparrow+H_2O` 4, `X_5+X_6->Ag_2O\downarrow+KNO_3+H_2O` 5, `X_7+X_8->Ca(H_2PO_4)_2` 6, `X_9+X_10->Fe_2(SO_4)_3+SO_2\uparrow+H_2O` `X_9^1+X_10->Fe_2(SO_4)_3+SO_2\uparrow+H_2O` `X_9^2+X_10->Fe_2(SO_4)_3+SO_2\uparrow+H_2O` `X_9^3+X_10->Fe_2(SO_4)_3+SO_2\uparrow+H_2O` `X_9^4+X_10->Fe_2(SO_4)_3+SO_2\uparrow+H_2O` `X_9^5+X_10->Fe_2(SO_4)_3+SO_2\uparrow+H_2O` 7, `X_10+X_11->Ag_2SO_4+SO_2\uparrow+H_2O` 8, `X_3+X_12->BaCO_3\downarrow+H_2O` 9, `X_3+X_13->BaCO_3\downarrow+CaCO_3\downarrow+H_2O` 10, `X_9+X_14->Fe(NO_3)_2+X_15`

Giải giúp mình bài này với ạ. Mình cảm ơn.

Trả lời giúp mik vs, mik sẽ vote 5* đầy đủ: Trẻ em trong giai đoạn 7-9 tuổi cao trung bình khoảng 1,2m. Nếu một đứa trẻ 8 tuổi nhưng chỉ cao 0,75m, cơ thể cân đối bình thường thì đứa trẻ đó có bệnh gì không, nếu bị bệnh thì có thể điều trị được không ?

Các bn giúp mk với, k chép mạng ạ và viết ngắn thui ạ

vẽ cá khóc * mn bảo tui nên làm j

nghỉ dịch còn mải hơn đi học. ai nghỉ giơ tay vẽ anime tức giận

Cho biết trách nhiệm của nhà nước trong việc công nhận và bảo hộ quyền sở hữu của công dân?

Exercise 1: Cho dạng đúng của các động từ trong ngoặc 1. I thanked her for everything she (do)____________for me. 2. Alan ___________hardly _____________(prepare) for dinner when her husband went home 3. Dan_______________two tablets this year. (already/ buy) 4. How many games_____________your team ____________ so far this season? (win) 5. ____________ you __________your homework yet? (do) 6. I_____________Peter since I arrived last Tuesday. (not/ see) 7. They went home after they (finish) ___________________their work. 8. She said that she (already, see) __________________Dr. Rice. 9. After Peter (take)_______________ a bath, he went to bed. 10. He told me he (not/eat) ________________such kind of food before. 11. When he came to the stadium, the match (already/ begin) _________________. 12. Before she watched TV, she (do)_________________ homework. 13. After they (go)_______________, I sat down and rested. 14. Yesterday, John (go) _____________to the store before he went home. 15. No sooner ___________I (watch)____________ TV than the phone rang. 16. Before I watched TV, I (do) ________________my homework. 17. After I (wash)______________ my clothes, I went to sleep. 18. It is the first time I ______________ (eat) sushi 19. She didn’t notice that she (never see) ______________that film before. 20. I suddenly remember that I __________________ (forget) my keys. Exercise 2: Cho dạng đúng của các động từ trong ngoặc A. PRESENT CONTINUOUS: 1. Hannah __________________ (not study) French in the library. She________ (be) at home with her classmates. 2. My kids (be)____________downstairs now. They (play)_____________chess. 3. While I (do)____________my homework, my sister (read) __________ newspapers. 4. She normally ____________ (live) in Northbridge but she _________________ (stay) with friends at the moment. 5. What sort of clothes _______ teenagers ________ (wear) nowadays? What sort of music _______ they __________( listen) to? 6. Paul and Sally___________ (have) had an argument they __________________ (speak) to each other. 7. You ____________ (make) a lot of noise. Can you be quieter? I _____________ (try) to concentrate. 8. Kate phoned me last night. She is on holiday in France. She__________ (have) a great time and ___________( not, want )to come back. 9. Tommy (clean) _______ his house and his father (repair) _______ their old car at the moment. 10. I (read) _________ this book but my sister (not read) __________ now.

GIÚP E VS Ạ UNIT 11 1. Cuc Phuong National Park is ________________ 160 km South West of Hanoi. (location) 2. It is the first of Vietnam's nine national parks to be established and it ________________ over 200 square km of rainforest. ( contain ) 3. Nairobi National Park is Kenya's smallest park, but you may be ________________ at the large variety of animals that live there. (surprising) 4. An interesting feature of this park is the Orphanage where lots of orphaned or ________________ animals are taken care of. (abandon) 5. This ________________ has threatened the park and many of the animals in it. (contaminate) 6. This contamination has _______________ the park and many of the animals in it. (threat) 7. What do you think will happen to the park if more chemicals are ________________ into the water? (releasing) 8. Visitors, especially children, can go there to learn how to recognize the ________________species of animals and plants. (difference) 9. This national park is special because it has plants and animals from both ________________ and temperate zones. (tropically) 10. His father was working ________________ at national park (industrious) 11. Inflation figures have fluctuated _______ between 0.2% and 25% (wild) 12. For a goalkeeper, it's a great _______ to have big hands. (advantageous) 13. She first rose to _______ as a singer at the age of 16. (famous) 14. Such data will prove _______ for researchers (valued) 15. Dolphins are a _______ species (protectively) II. TENSES Exercise 1: Cho dạng đúng của các động từ trong ngoặc 1. I thanked her for everything she (do)____________for me. 2. Alan ___________hardly _____________(prepare) for dinner when her husband went home 3. Dan_______________two tablets this year. (already/ buy) 4. How many games_____________your team ____________ so far this season? (win) 5. ____________ you __________your homework yet? (do) 6. I_____________Peter since I arrived last Tuesday. (not/ see) 7. They went home after they (finish) ___________________their work. 8. She said that she (already, see) __________________Dr. Rice. 9. After Peter (take)_______________ a bath, he went to bed. 10. He told me he (not/eat) ________________such kind of food before. 11. When he came to the stadium, the match (already/ begin) _________________. 12. Before she watched TV, she (do)_________________ homework. 13. After they (go)_______________, I sat down and rested. 14. Yesterday, John (go) _____________to the store before he went home. 15. No sooner ___________I (watch)____________ TV than the phone rang. 16. Before I watched TV, I (do) ________________my homework. 17. After I (wash)______________ my clothes, I went to sleep. 18. It is the first time I ______________ (eat) sushi 19. She didn’t notice that she (never see) ______________that film before. 20. I suddenly remember that I __________________ (forget) my keys

Exercise 5: Cho dạng đúng của các động từ trong ngoặc 1. The World War II _____________ in 1939 and _____________in 1945.( begin/ end) 2. Yesterday, I _____________at the checkout when I _____________ a strange-looking man .( wait/ notice) 3. A: _____________you _____________your homework yet? ( finish) B: Yes, I have. But I really _____________homework. (hate) 4. On the way home yesterday, she _____________the car as soon as the light _____________ red.(stop/ turn) 5. As soon as the alarm clock went off, she _____________up and _____________out of bed.(wake/go) 6. I _____________very tired when I got home, so I _____________straight to bed.(feel/go) 7. Last night, I went to Jim’s room and _____________ (knock) on the door but there _____________ (be) no answer 8. My family_____________ (live) in Hue from1990 to 1996, but now we _____________ in Sai Lion.(live) 9. Karen is very free today, but she_____________ (not want) to come to the cinema with us because she_____________ ( see) the film last week. 10. When we_____________ ( reach) the city center ,we couldn't find a parking space, so we _____________ (decide) to go to Aeon mall. 11. When I_____________ (come) to her house yesterday, she _____________ (be) out . 12. While The firemen _____________ (put) out the burning house, the reporters_____________ (arrive)