: Trong phòng thí nghiệm từ 1,5.1023 phân tử KClO3; 2,1.1023 phân tử CaCO3 và 2,7.1023 phân tử KMnO4 người ta điều chế được bao nhiêu dm3 khí oxi ở đktc? ( Lấy N = 6.1023 ). A. 25,2 dm3. B. 16,8 dm3. C. 13,44 dm3. D. 19,32 dm3.

finish the second sentences so that is has a similar meaning to first one , beginning with the given words 1. Finding a decent place to live in a slum is not easy ->It is 2.I fell asleep because the film was boring -> it was such 3.They have given me two interesting books -> Two Combine two sentences into a new one using the given words in brackets . Do not change the given words in any ways 4. she want to dye her hair . she will ask her mom to do it for her (get her mom) -> 5.Lily told us the truth. Everyone believes that ( Lily is belived) -> 6.There is a sign. It says we can't play cards in here(that) -> 7.No one can enter this area . The police won't allow it(forbid) -> giúp mình với ạ

Giúp e giải bài 3 và bài 4 được k ạ???

  I. Put the verbs in the brackets in the corect tenses: 1. He never.....(listen) to what you say. He always .........(think) about something else. 2. We ...................(not meet) each other since we .......................(leave) school. 3. She..................... (not study)on Friday. 4. I usually ....................(have) breakfast at 7.00. 5. We (fly).................... to Spain every summer. 6. My mother .............. (fry)eggs for breakfast every morning. 7. The bank ................(close)at four o'clock. 8. Yesterday, I ...............(go) to the restaurant with a client. 9. When we.................. (arrive) at the restaurant, the place............... (be)full. 10. I ...............(not go) to school last Sunday. 11. ...........she ..........(get) married last year? 12. After she .........................(finish) her homework, she ................(go) out with her friends. 13. Yesterday, she.....................(burn) her hand while she .......................(cook) dinner. 14. Look ! Peter ........................(play) a piece of his favourite music. II. Change these sentences into passive voice: 1. My father waters this flowers every morning ...................................................................................... 2. John invited Fiona to his birthday party last night .................................................................................... 3.Her mother is preparing the dinner in the kitchen.  .................................................................................. 4. We should clean our teeth twice a day .......................................................................................... 5. Our teacher have explained the English grammar .......................................................................................... 6. Tom will visit his parents next month .......................................................................................... 7. Her mother used to give her some sweets after the meals .......................................................................................... 8. They are going to build a new supermarket near my house .......................................................................................... 9. We need to protect our environment .......................................................................................... 10. Do your paretns make you study hard ? .......................................................................................... III. Give the right form of the verbs in the brackets to complete the following sentences: 1. If I were you, I .....................(go) to Ha Noi with him right now. 2. If I had a wing, I.........................(not have to) take an airplane to fly home. 3. If someone ..................(enter0 the building, the alarm bell will go off. 4. He..................(pass) his examination if he ......................(study) hard last year. 5. If it ....................(rain) tomorrow, I will saty at home at watch TV. 6. You .........................(have) a medical degree if you want to get that job. 7. If she speaks English better, she.......................(be) chosen for that job. 8. If you don't tell the truth, we..........................( not help) you. 9. The dog is .....................so it barks......................(angry). IV. Give the right forms of the words in brackets: 1. Don't speak so ..................... . I can't understand you. (fast) 2. The bus driver was ..............injured because he is not a ...............driver. (serious) 3. Robin looked ....................and....................gave me that letter, this morning. (sad) 4. I'm pleased the plan worked so .......................(good) 5. I can play the guitar .............................(good) 6. I have a ........................book. (beauty) 7. The class is ............... loud today. (terrible) 8. Max is a .............. singer. (good) 9. You can ... ...............open this tin. (easy) 10. It's a ................ day today. (terrible) 11. She sings the song .............. . (good) 12. He is a ................ driver. (careful) 13. He drives the car .............. (careful) 14. My children are so ...........in the cartoons because they find these film very ..............(interest). V. Supply the correct form of the word in the parentheses 1. They used to (go/going/to go/went) to Da Lat when we were young

Viết đoạn văn (khoảng 10- 12 câu) miêu tả một đêm trăng nơi em ở.

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Cho tứ giác abcd có a=100.b=70.gọi e là giao điểm của các phân giác trong của góc A và góc B .số đo của góc aeb là

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Nếu lấy 2 chất pemanganat (KMnO_4) và Kali clorat (KClO_3) với khối lượng bằng nhau để điều chế oxi. Chất nào cho thể tích nhiều hơn. Chú ý: _3 là 3 nhỏ ý nhưng mik ko ghi đc kiểu thế. M. N giải hộ e với.