Cho 1 dây Mg khối lượng 30g vào 200g dung dịch FeSO4 7,6% đến p/ư hoàn toàn . Sau p/ư lấy dây Mg ra rửa sạch làm khô. Tính KL dây Mg sau pư biết toàn bộ kim loại giải phóng ra bám vào dây Mg

cho tam giác abc vuông tại c. gọi m là trung điểm ab. vẽ me vuông góc ac tại e, mf vuông góc bc tại f. a) CM: tứ giác cfme là hình chữ nhật và cm = ef b) CM: E là trung điểm AC c) Gọi D là điểm đối xứng với M qua AC. CM: tứ giác CMAD là hình thoi d) Gọi O là giao điểm của CM và EF. CM: 3 điểm B,O,D thẳng hàng giúp mik vs mik tick cho mai mik kt rồi

đối với mạch kín có nguồn điện và mạch ngoài là điện trở thì hiều điện thế ở mạch ngoài: A.Tỉ lệ thuận với dòng điện qua mạch B. Tăng khi cường độ dòng điện qua mạch tăng. C. giảm khi cường độ dòng điện qua mạch tăng D. tỉ lệ nghịch với dòng điện qua mạch. giải thích giùm

Question 79: are being printed on souvenir products,/ conveying the message on the importance/ of heritage preservation/ to visitors./ Winning/ artworks/ ------------------------------------------------------------------------------------------------------------------------- Question 80: are collected/ box./ from/ The letters/ the post/ ------------------------------------------------------------------------------------------------------------------------- Question 81: are held in years/ by four./ evenly divisible/ In the United States,/ presidential elections/ ------------------------------------------------------------------------------------------------------------------------- Question 82: are used to/ manual/ school girls/ Those/ work./ ------------------------------------------------------------------------------------------------------------------------- Question 96: at the entrance/ John Lennon was shot/ of the building/ on 8th December 1080./ where he lived/ Question 97: at the Sheraton/ for the/ I’ve booked/ night./ you in/ Question 106: behind the camera to direct./ the band’s singer and songwriter/ the first time/ The video marks/ Zooey Deschanel has stepped/ Question 108: between two or a group/ Communication is the meaningful/ exchange/ of information/ of person./ Question 110: Bill/ had paid me my money or/ I wondered/ if / not./ Question 115: by one of guards./ curiosities/ had been/ stolen/ The old/ Question 118: Choose the sentence with the same meaning as the following sentence: The girl has just gone out. Do you know her? A. Do you know the girl whose has just gone out? B. Do you know the girl whom has just gone out? C. Do you know the girl which has just gone out? D. Do you know the girl who has just gone out? Question 119: Choose the sentence with the same meaning as the following sentence: The test was very difficult. We could do it. A. We could do the test although it was very difficult. B. We could do the test although it were very difficult. C. We could do the test although it was very difficulty. D. We could do the test although it is very difficult. Question 120: Choose the sentence with the same meaning as the following sentence: The weather was so bad that we couldn’t go swimming. A. The weather was not enough good to go swimming. B. The weather was not good enough to going swimming. C. The weather was not good enough to go swimming. D. The weather was not so good that we could go swimming. Question 121: Choose the word that has the letter(s) pronounced differently from the others. A. cleaned B. brushed C. played D. snowed Question 139: During/ he was assassinated/ some of the guests./ the receotion,/ while shaking hands with/ Question 140: Eleven houses ______ in many village this year. A. Have just sold B. have just been sold C. had just been sold D. has just been sold. Question 141: English words./ he knew/ more/ My student/ wishes/ Question 142: English/ every day./ It is/ necessary for/ you to practice/ Question 137: Don’t forget to buy me a dictionary,...? A. do you B. will you C. shall you D. don’t you Question 129: despite/ He/ his/ laziness./ passed the examination/ Question 147: Every year on December 10, the _________ of Nobel’s death, the awards are presented to the winners. Question 149: Examples of gender-based violence and _____ trafficking have already been observed in Viet Nam and point to some of the risks faced by vulnerable girls and women. Question 155: Globally,/ has fallen from 60 million/ in 2008 to 57 million in 2011./ out of school/ the number of children/ Question 161: Good financial accounts are vital ___ ____ the success of any enterprise. Question 162: guide/ instructions/ on how to apply./ provides step-by-step/ The application/ Question 163: Hardly had I arrived _______ the train came in. Question 164: have finished/ I/ many complicated layers./ poster with so/ such a colorful/

tìm các số x,y thõa mãn đẳng thức 3x^2 + 3y^2 +4xy+2x - 2y +2 = 0 giaiỉ giúp mk nha

Em hãy : Thuyết minh về cây Bút bi. ( Các bn đừng chép lại trên mạng giúp mk nha)

Hỗn hợp X gồm C2H2 và C3H8 có tỉ khối so với H2 là 15,25. Để đốt cháy hết 4,48l (đktc) hỗn hợp X thì thể tích O2 (đktc) tối thiểu cần dùng là bao nhiêu?

Cho mình thơ xuôi,ca dao tục ngữ và truyện ngắn về ngày 20/11

Viết một đoạn văn chủ đề là kể lại câu chuyện khiến em suy nghĩ mãi trong đó có sử dụng Tình thái từ

Hãy tưởng tượng mình gặp gỡ và trò chuyện với người lính lái xe trong tác phẩm Bài thơ về tiểu đội xe không kính của Phạm Tiến Duật. Viết bài văn kể lại cuộc gặp gỡ và trò chuyện đó