Cho 59,4g Al td với dd HNO3 4M ta đc hh khí NO và N2O có tỉ khối hơn H2 là 18,5.Tính thể tích NO và N2O thu đc và thể tích dd HNO3

ai giúp em vs ạ ( em đăng 3 lần rồi í ạ 😢)

1881. By the time we get out of this traffic jam, all the guests _______ home. A. have gone B. had gone C. will go D. will have gone 1882. ______ members of the class has to be responsible for his own actions. A. Each of the B. Every C. None of D. All 1883. The teacher _______ them the answer to the question. A. explained B. said C. discussed D. told 1884. We met each other at the meeting ______ coincidence. A. by B. in C. for D. to 1885. As we‟ve been discussing for 2 hours without any solution, I‟d like to ______ my own solution to this problem. A. come up B. bring down C. put forward D. take in 1886. The accident resulted ______ some minor injuries. A. to B. from C. in D. of 1887. Dave, I really appreciate _______ me. But I think I could manage it myself. A. you to help B. you helped C. your helping D. that you would help 1888. One of the robbers was described by the witnesses _______ tall and about 25. A. like B. by C. in D. as 1889. I left the purse at home. Can you _______ without breakfast today, dear? A. go B. do C. make D. live 1890. One of the solutions _______ by environmentalists is to ban vehicles from the city center. A. are suggested B. is suggested C. suggesting D. suggested 1891. While the boss was away, her assistant stood ______ her and helped her solve any problems arising. A. up to B. in for C. up against D. out of 1892. I would like to rent a house, modern, comfortable, and _______ in a quite place. A. before all B. above all C. first of all D. after all 1893. We could never get ready for the test at such short _______. A. call B. notice C. advice D. note 1894. To resist corrosion _______ for today's car to prevent havoc caused by road salts, gravel and other materials. A. have new coatings been developed B. new coatings developing C. development of new coatings D. new coatings have been developed

Tìm nghiệm của A(x) = 6x +3 NL : Viettel vs Ulsan Hyundai

viết lại câu sao cho giống với câu đầu tiên bằng từ cho sẵn trong ngoặc. Sử dụng từ hai đến năm từ, bao gồm cả từ đã cho. 1. There are fewer teachers in my school than there were last year. (NOT) There __________________________________________ teachers in my school as there were last year 2. My mother isn’t quite as tall as me. (SLIGHTLY) My mother is ____________________________________________ me. 3. This exercise is much easier than the last one. (NEARLY) This exercise is __________________________________________________ the last one. 4. Jamie’s mobile is very similar to mine. (LOT) There is not ________________________________________________ Jamie’s mobile phone and mine 5. . There are more boys than girls in our class. (AS) There are ___________________________________________ as boys in our class. 6. I’ve never known anyone as clever as Hilary. (THE) Hilary is _______________________________________________ ever known 7. . I have never read a better book than this one. (EVER) This is the __________________________________________________ read. 8. The painting Edward did is the ugliest one you can imagine. (THAN) You can’t imagine ____________________________________________________ the one Edward did. 9.Home computers used to be much more expensive. (AS) Home computers aren’t ___________________ used to be 10. The north-west of Britain has more rain each year than the south-west. (THAT) The annual rainfall in the north-west of Britain _________________________________ the south-west.

1867. We have bought extra food _______ our friends stay to have dinner. A. in case B. if C. provided D. as long as 1868. Cut this cake into six _______ pieces. A. same B. alike C. like D. equal 1869. If only it _______ differently! I had hoped to be acquitted. A. had been concluded B. were concluded C. had concluded D. concluded 1870. I was ______ in the countryside but went to school in HCMC. A. brought up B. taken over C. made up D. put off 1871. Most of _______ archaeologists know about prehistoric cultures is based on studies of material remains. A. these B. what C. which D. their 1872. We couldn‟t afford that house because it ________. A. was over my head B. paid through the nose C. cost an arm and a leg D. blew my own trumpet 1873. ______ the Christmas shopping season begins. A. That is after Thanksgiving B. After Thanksgiving it is C. It is after Thanksgiving that D. It is Thanksgiving that 1874. New York City is America‟s largest city, ______ it is not the capital of New York State. A. therefore B. but C. so D. however 1875. He promised her an Oxford dictionary, but disappointingly he _______ on his word. A. turned over B. stood up C. went back D. sat down 1876. This young music composer is very famous _______ the most influential composer. A. for B. to C. as D. with 1877. She came ______ a lot of problems at work. A. up with B. down with C. in for D. up against 1878. They take ______ each other like two peas. A. in B. after C. to D. for 1879. Didn‟t it ever ______ to them that they would be severely punished? A. occur B. happen C. enter D. come 1880. If you want to ______ weight, cut down on fat. A. put off B. come down C. take over D. cut off

Xin phép nói tý : hỏi muốn mắc mệt mà chả ai tl thế :)) đưa 20đ mà trong khi còn có ít điểm hà đấy rui 10đ chắc chả ma nào giải 😞 Cho tam giác ABC. Từ một điểm M bất kì trong tam giác kẻ ME, MD,MF lần lượt vuông góc với các cạnh BC, AC, AB. Chứng minh rằng: BE^2 + CD^2 + AF^2 = CE^2 + AD^2 + BF^2

Trong câu : " Mùa hè - mùa hoa tóc tiên, tôi thường đến nhà thầy giáo." dấu gạch ngang có tác dụng gì ? Viết câu trả lời của em : ...............................................................................................................

Số chất điện li yếu là ? Chắc là đề 'sai' là 6.

làm hộ nhé '-')..................................................................................................