cho phản ứng sau 2Fe+3Cl2---> 2FeCl3 a tính khối lượng của Cl2 tham gia phản ứng khi có 16,8g Fe tham gia phản ứng b tính khối lượng của FeCl3 tham gia phản ứng khi có 16,8g Fe tham gia phản ứng c tính khối lượng của FeCl2 thu được,Fe tham gia phản ứng khi có 13,44l Cl2 tham gia phản ứng ở (đktc)

-21/15.x+1/3=-2/5 15/7:x-2/5=1/5 /x-1,5/=2

CHO HÌNH THOI ABCD CẠNH A. TÍNH : ║AC - BD ║; ║AB- BC-CD-DA ║( có dấu vecto ở trên nha)

21. I’m going to buy a computer. I haven't got much money. (even though)  ………………………………………………………………………………. 22. I intend to go for a walk this morning. It's raining. (even if)  ………………………………………………………………………………. 23. I'd like to help you. I'm afraid I won't be able to. (much as)  ………………………………………………………………………………. 24. Your design is excellent. It isn't suitable for our purposes. (while)  ………………………………………………………………………………. 25. I try hard to play the piano. I don't seem to improve. (although)  ………………………………………………………………………………. 26. The play was wonderful. The film was a commercial failure. (Whereas)  ………………………………………………………………………………. 27. I took twenty driving lessons to pass my driving test first time.(so that/in order that) 28. I arrived at the cinema early so as not to miss the beginning of the film. .(so that/in order that) 29. We stood up in order to get a better view of what was happening. .(so that/in order that) 30. Mr Jones bought a second car for his wife to learn to drive. .(so that/in order that) 31. 5 1 spoke slowly and clearly because I wanted the audience to understand me. .(so that/in order that) 32. I'm going to sign the agreement immediately. You might change your mind. (in case)  ......................................................................................... 33. Take this key with you. You might not be able to get into the house. (in case)  ......................................................................................................................... 34. We keep a fire extinguisher in the kitchen. There might be a fire. (in case)  ............................................................................................................... 35. Go by train. There might be a lot of traffic on the roads. (in case)  .................................................................................................................................. 36. I'm going to take my passport with me. I might need it. (in case)  ......................................................................................................... 37. We were late. We missed the first act of the play. (so…..that…)  ... ......................................................................................................... 38. I was working hard. I forgot what the time was. (so…..that…)  ......................................................................................................... 39. There was a delay. We missed our connecting flight. (such…..that…)  ......................................................................................................... 40. We've had difficulties. We don't think we can stay in business. (such…..that…)  ......................................................................................................... 41. John works hard. Susan works hard. ( as ... as)  ......................................................................................................... 42. John is less intelligent than Susan. (not so ... as)  ......................................................................................................... . 43. This computer holds less information than that one. (not ... as much ... as) .  ......................................................................................................... 44. The film 'Superman 1' is enjoyable. 'Superman 2' is enjoyable, too. (as ... as)  ......................................................................................................... 45. I don’t feel well enough to go out tonight. I will stay home and rest. (thus)  ......................................................................................................... 46. Milky Way includes the Sun and its solar system. It contains about 400 billion other stars. (furthermore)  .............................................................................................. 47. I can speak English. I can speak Spanish too. (not only……….but also)  .............................................................................................. 48. I will not talk to you if you don’t apologize to me. (Unless)  .............................................................................................. 49. She has a bad cold. She still wants to attend the class today. (Although)  .............................................................................................. 50. The boxer was very strong. He knocked out all of his opponents in the first round. (so…….that…….) 

kể lại cuộc chia tay của những con búp bê bằng lời văn của em

Hai gen 1 và 2 có chiều dài bằng nhau. Gen 1 tích số giữa A và G bằng 4%. Gen 2 tích số giữa G và X bằng 9%. Số liên kết hiđro của gen 1 nhiều hơn số liên kết hiđro của gen 2 là 150. a) Tính chiều dài mỗi gen. b) Tính số liên kết hiđro của mỗi gen. c) Hai gen trên đều tự nhân đôi 5 lần thì môi trường nội bào cung cấp số Nu mỗi loại là bao nhiêu?

DÙNG TỪ CHO SẴN Ở TRONG NGOẶC ĐƠN ĐỂ NỐI 02 MỆNH ĐỀ 1. The taxi stopped at the station. Two men got out of it. (and)  ……………………………………………………………………………. 2. You can give me some advice. Your colleague can. (Either you ... or)  Either …………………………………………………………………………….  Either ……………………………………………………………………………. 3. We got ready to get on the train. It didn't stop. (but)  ……………………………………………………………………………. 4. No one was in when we called. We left a message. (so)  ……………………………………………………………………………. 5. We didn't want to get home late after the film. We went straight back. (so)  ……………………………………………………………………………. 6. The old lady was nervous. She wasn't used to strangers calling late at night. (for)  ……………………………………………………………………………. 7. I've always wanted to live in the country. My parents prefer to live in town. (but)  ……………………………………………………………………………. 8. The letter has been lost. The postman has delivered it to the wrong address. (or)  ……………………………………………………………………………. 9. For a moment the top of the mountain was visible. A cloud covered it. (and then)  ……………………………………………………………………………. 10. Jane was a successful career woman. Her mother wanted her to be a housewife. (yet)  ……………………………………………………………………………. 11. I lost a lot of weight. I was ill. (when)  ………………………………………………………………………………. 12. I phoned home. I arrived in the airport building. (immediately after)  ………………………………………………………………………………. 13. She had already opened the letter. She realized it wasn't addressed to her. (before)  ………………………………………………………………………………. 14. The building had almost burnt down. The fire brigade arrived. (by the time)  ………………………………………………………………………………. 15. We realized that something had gone wrong. We saw him run towards us. (as soon as)  ……………………………………………………………………………… 16. I won't know if I have got into university. I will get my exam results. (until)  ………………………………………………………………………………. 17. I'II give him your message. He will phone. (as soon as)  ………………………………………………………………………………. 18. We should visit the Duty Free Shop. Our flight will be called. (before)  ………………………………………………………………………………. 19. I'II be dead. They will find a cure for the common cold. (by the time)  ………………………………………………………………………………. 20. You'll get a surprise. You will open the door. (the moment)  ……………………………………………………………………………….

my english is not very good . i wish i .....it in few months điền và cho mình biết tại sao we will be there ... 5 c'clock early .. the morrning

chiếu tia tới phân kì lên gương cầu lõm ta được chùm tia phản xạ có tính chất gì? chiếu tia tới phân kì lên gương cầu lồi ta được chùm tia phản xạ có tính chất gì?

trình bày các giai cấp trong xã hội phương tây cổ đại . So sánh phận nô lệ trong xã hội phương tây so với phương đông giúp mik với