Đốt cháy hoàn toàn 0,2 mol một anken A thu được 14,4 gam H2O. Công thức anken là * A. C4H10. B. C2H4. C. C4H8. D. C3H6.

Giải bài toán sau bằng cách lập hệ pt 1 khu vườn hcn có chu vi 240m biết 2 lần chiều dài lớn hơn chiều rộng 90m Tính 2 kịch thước của khu vườn

16.We understood almost what he said. He had a strange accent. A. He had a strange accent; however, we understood almost what he said. B. We understood almost what he said because he had a strange accent. C. We understood almost what he said but he had a strange accent. D. He had a strange accent so we understood almost what he said. 17.He suffers from physical handicap. He has become a successful businessman. A. Although suffer from physical handicap, he has become a successful businessman. B. Despite his physical handicap, he has become a successful businessman. C. In spite of physical handicap, he has become a successful businessman. D. Though being physical handicap, he has become a successful businessman. IV. Choose the best sentence that can be made from the cues given. 18.In spite/high prices/, my daughters insist/going/movie. A. In spite the high prices, my daughters insist on going to the movie. B. In spite of the high prices, my daughters insist going to the movie. C. In spite the high prices, my daughters insist on going the movie. D. In spite of the high prices, my daughters insist on going to the movie. 19.In spite/poverty/, everyone/has/regard/him. A. In spite of his poverty, everyone has great regard for him. B. In spite to his poverty, everyone has great regard for him. C. In spite of his poverty, everyone has great regard at him. D. In spite to his poverty, everyone has great regard with him. 20. The flight /delayed/ though /it /foggy. A. The flight was delayed though it was foggy. B. The flight was delayed though it is foggy. C. The flight was not delayed though it was foggy. D. The flight was not delayed though it is foggy.

ai giúp e b7 với ạ em cần gấp em vote 5s

hãy kết hợp những câu này sử dụng củm từ và trạng đề chỉ mục đích a,Mr.Rike is learning Vietnamese .He wishes to read Kim Van Kieu b, Please shut the widowns and the door .I don't want the cat to go into the house c, The man built a hingh wall around his garden .The jrut wouldn't bestonle d, The poli ceman spopped the traffic every fewminuto the pedes trians might cross the rosd e, The notices written is several languages .Evenyone may unders tand them f,The little girl stood on the chair.She could se better g, Ite wishes he had enough money .He wantns to buy a new house h, Britney is practicing the piano.She can play for the dance i,I need ajob .I want to support my ald teacher j, we moved to the front row .We could hear the speaker better

Đốt cháy hoàn toàn 0,1 mol anken X thu được 8,96 lít CO2 (ở đktc). Mặt khác, cho X tác dụng với HCl thì cho một sản phẩm duy nhất. X là * A. etilen. B. but-2-en. C. but-2-en và but-1-en. D. but-1-en.

2.cho tia OD nằm giữa hai tia OM,ON. Biết ^MON = 60 độ và ^MOD = 1/4 ^MOD .tính ^MON,^NOD

câu1 : Cho 3 điểm A(2;1), B(3;5) và C(-1;2) a)Lập phương trình Cạnh AC của tam giác ABC b), Lập phương trình đường trung tuyến CI của tam giác ABC MẤY BẠN ƠI GIÚP MÌNH VỚI các bạn ơi mình cần gấp lắm PLEASE

Tìm 1 số có hai chữ số và 1 số có 1 chữ số sao Cho tổng hai số đó bằng 10

làm hộ mình chi tiết chính xác bài này mình tặng 60 điểm, vote 5 sao, cho câu trả lời hay nhất làm sai,bừa,thiếu mình kiện Tính giá trị của biểu thức: B = x2-4xy+4y2, biết:x-2y=0