Cho 12,8 gam kim loại M hóa trị 2 tác dụng với 6,72lít khí Cl² . Sau phản ứng thu được m muối khan. Tìm m muối khan,xác định kim loại M

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So sánh sự khác biệt giữa các yếu tố tự nhiên ở Trung Phi với Bắc Phi.

Tại sao tổn thương 1 bên não sẽ làm tê liệt các phần thân bên phía đối diện?

XVI: Complete the sentences with although/in spite of/because/because of 1 Although it rained a lot, we enjoyed our holiday. 2 a, ………………………. all our careful plans, a lot of things went wrong. b, ………………... we'd phoned everything carefully, a lot of things went wrong. 3a, I went home early ……………….……... I was feeling unwell. b, I went to work the next day………………… .... I was still feeling unwell. 4 a, she only accepted the job ....................................... the salary, which was very high. b, she accepted the job ………………………………. the salary, which was rather low. 5a, I managed to get to sleep ………………………... there was a lot of noise. b, I couldn't get to sleep ………………………………...... the noise. làm đúng nha

Tính diện tích hình thang có đáy lớn hơn đáy bé 30 cm; biết 20% đáy lớn bằng 30% đáy bé, đáy bé kém chiều cao 0,5 cm.

III. Choose the correct answer A, B, C or D to finish the sentences: 1. Kien often ……………….. his bike to visit his hometown. A. drives B. flies C. rides D. goes 2. I and my brother live ………….. 58 Hoang Dao Thanh Street. A, in B, on C, at D, from 3. She is ………….. at Maths than her sister. A, good B, better C, best D, the best 4. Which car is ………………., the red one or the black one? A. cheap B. the cheapest C. cheaper D. more cheap 5. You …………. go to the doctor when you are ill. A, can B, may C. must D. should 6. ………….. do you brush your teeth? - “Twice a day” A, How much B, How often C, How far D, How long 7. They …………… to Ha Long Bay this summer vacation. A, go B, goes C, is going D are going 8. Sahara is the hottest ………………… in the world. A. forest B. cave C. desert D. mountain 9. Phanxipang is a famous …………. in Vietnam. A, river B. forest C, beach D, mountain 10. “Look! The girls …………… rope in the playground .” A. is skipping B. are skipping C. skips D. skips 11. White chocolate is ………………… than black chocolate. A. creamier B. more creamy C. creamiest D. creamy 12. –“What are you doing this afternoon?” -“I don’t know, but I’d like to ……………… swimming.” A. have B. do C. play D. go 13. Ann is 18 years old. Sue is 20 years old. Jane is 22 years old. Ann is …………………. A. older B. younger C. the oldest D. the youngest 14. Today the weather is ……………….… than yesterday. A. worse B. more bad C. more good D. well 15. Sorry we’re late. Your house is much ………………… than we thought. A. far B. the farthest C. the farther D. farther 16. Write a report first. It’s more important ………………. your other work. A. than B. as C. from D. then 17. His job is …………………important than his friend’s. A. as B. more C. so D. the most 18. The baby is sleeping. You ……………… shout A. can B. can’t C. must D. mustn’t IV - Fill the spaces with the correct comparative and superlative adjectives. 1. Our hotel was ……………………..… than all the others in the town. (cheap) 2. Tokyo in Japan is (big) ………………………..than London in England. 3. My mother is the (good) ………………………… cook in my family. 4. The Great Wall of Chine is the (long) …………….………… wall in the world. 5. Is Tom ( intelligent ) ……………………..……….. than his brother? 6.My father’s cooking is (bad)............................................ than my mother’s 7. Street in HCM City is (noisy) ……………..…………… than street in Hue. 8. Skiing is the (exciting) ………………………. activity in winter. 9.Love is ( important).................................................... than money 10. Travelling by plane is (fast) ……………..……… than travelling by ship. V - Rewrite the sentences so that they have the same meaning as the ones given. 1. No one in my neighborhood is cleaner than this hotel . → This hotel is …………………………………………………… 2. The Black car is more expensive than the White car. → The White car is …………………………………………………………………. 3. This exercise is easier than that one. →That exercise is more ........................................................................................ 4.My kitchen is smaller than yours. → Your kitchen................................................................................................... 5. We / mustn’t / drive / the right / in London. (Complete the sentence) → …………………………………………… 6. There / not / many tall building / my neighborhood. (Complete the sentence) → ………………………………………………………………….. 7. Students / must / keep / school / clean / beautiful. (Complete the sentence) → ……………………………………………………………………….. 8. Who / the strongest / your / family? (Complete the sentence) → ……………………………………………………………….. 9. Remember to do your homework. → You must …………………………………………………………………… giúp gium em với ạ

Phương trình biểu diẽn phản ứng hóa học giữa natri oxit(Na20) với nước sinh ra natri hidroxit là Cho 5,6 gam Fe phản ứng vừa dủ với dung dich axit clohidric HCL tạo ra sắt(2) clorua Fecl2 và khí H2.Khối lượng HCL đã dùng là CÁC BẠN CHỈ HỘ MÌNH VS Ạ MÌNH DỐT HÓA

Câu 13. Dãy gồm các chất đều phản ứng với Clo là A. NaOH, Al, Cu(OH)2, CuO. B. Cu(OH)2, Cu, CuO, Fe. C. Ca(OH)2, NaOH, HI, NaBr. D. NaOH, NaCl, NaI, CaO.

1/ĐTRT ( đặt tính ra luôn cho câu trả lời hay nhất) 54,94 - 9,637 63,85 x 3,2 14,31 : 4,5 2/ một cửa hàng đầu tư một số tiền để kinh doanh. sau 1 thời gian cửa hàng lãi được 18 triệu đồng chiếm 12 % vốn đầu tư. hỏi ban đầu cửa hàng đó có vốn đầu tư là bao nhiêu?