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tranquang11
2 năm trước
Bài 27: Thực hiện các thí nghiệm sau: TN1: Cho m gam Al2(SO4)3 tác dụng với 150 ml dung dịch Ba(OH)2 2M thu được 2,09a gam kết tủa. TN2: Cho m gam Al2(SO4)3 tác dụng với 160 ml dung dịch Ba(OH)2 2M thu được 2a gam kết tủa. Tính m? ( Biết các phản ứng xảy ra hoàn toàn)
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Làm giúp mình với ạ, có giải thích luôn. Mình cảm ơn III - Circle one letter to indicate the underlined part that needs correction in each of the following questions 1. My classmates were going on a trip to Cue Phuong National Park this weekend. A. My B. were C. a D. this weekend 2. (Trích Đề thi thử THPT QG chuyên ĐHSP HN) At the Hermitage, Andrew Jackson’s home in Tennessee, even his glasses have been left exactly where he lay them. A. even B. have been left exactly C. exactly D. lay 3. No one came to see us since we bought that expensive car. A. came B. since C. bought D. expensive 4. Not only were there methods and strict rules but he needs to practice them as well. A. there B. strict C. needs D. them 5. A 1971 U.S government policy not only put warnings on cigarette packs but also ban television advertising of cigarettes. A. government B. warnings C. ban D. advertising 6. They’re are going to Phu Quoc city when they will finish their homework. A. are going to B. when C. will finish D. homework 7. I’m sure he would be home and dry in the interview because he has good qualifications and wide experience. A. sure B. would C. the D. has 8. He was late because he get stuck in the traffic jam. By the time he got to the station Janice had been waiting for him for more than three hours. A. was B. get C. got D. had been waiting 9. When Harry arrived at the prom Linda wasn’t there. She has just gone home. A. arrived B. at C. wasn’t D. has 10. Linda’s bedroom was green yesterday. Now it is yellow. She had painted her bedroom. A. was B. Now C. is D. had 11. During last summer months, the monastery was very busy, for it is visited by thousand of people who had cross the pass in cars. A. months B. was C. visited D. had cross 12. A minor earthquake occurred at 3 am on September 6. Most of the people in the village slept at the time and didn’t even know it had occurred until the next morning. A. occurred B. slept C. didn’t D. had occurred 13. He had been teaching since twenty years before he retired last year. A. had been teaching B. since C. before D. retired 14. Tom used to travelling a lot in his job but now, since his promotion, he doesn’t. A. travelling B. job C. since D. doesn’t 15. Will you take the children to the cinema this weekend? I have seen some tickets on the table A. Will you B. the C. have seen D. tickets

Rewrite the sentences : 1. This is the most delicious cake I've ever eaten. => I've................................ 2. I've never met any more intelligent person than Peter .=> Peter is.............................. 3. There isn't anybody as kind as your brother. => Your brother is........................ 4. There is no better teacher in this school than Mr John. => Mr John is................................... 5. Have you got any bigger than that one? => Is this.......................................? 6. My house is bigger than your house. => Your house is...................... 7. The black car is cheaper than the red car. => The red car_____________ 8. This film is more interesting than that one. => That film is_____________ 9. My kitchen is smaller than yours. => Your kitchen________________ 10. My grandmother is older than every one in my family. => My grandmother is the________ Help!!!

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