1.Cho 3,6 gam kim loại R tác dụng với dung dịch H2SO4 loãng, dư ta thu được 3,36 lít khí H2 (đktc). Xác định kim loại R. 2.Cho 1,26 gam một kim loại R tác dụng với dung dịch H2SO4 loãng tạo ra 3,42 gam muối sunfat. Xác định tên kim loại R. Làm một bài cũng đc :((

Giúp em câu 4 em đang cần gấp lắmmm

giải giúp mik bài này nhanh đc hok ạ

ex1. dùng hình thức đúng của động từ trong ngoặc. 1. Every morning, Thu (get)... up 6. She (have) ... breakfast at 6.10. After breakfast she (brush) ... her teeth. She (go)... to school at 6.30. She ( have) ...lunch at 11.30 at school.

1. Liz drinks more milk than them. => They don’t…………………….…………… 2. Racheal doesn’t cook as well as Helen. => Helen cooks…………………………… 3. We don’t live as far from Tokyo as he does. => He lives……………………………………… 4. He has fewer holidays than he used to. => He doesn’t…………………………… 5. I’ve never had such a bad experience before. => It’s the………………………………………… 6. Nobody in the family drives as badly as he does. => He is……………………………………………… 7. Nga can speak English faster than me. -> I can’t………………………………… 8. None of the other books in the shop is as interesting as this one. => This book………………………………… 9. He is the most generous person I know. => I don’t know………………………… 10. The market is less crowded than usual. -> The market …………………………

5/ √x + 5 = 5/7 Dấu gạch ngang là trên ạ Giúp mik ạ

V. Hãy dùng các từ gợi ý sau để viết thành câu hoàn chỉnh. 1. My grandfather / grow / flowers / his garden. 2. There / too many vehicles / too much noise / Ha Noi City. 3. Don’t/any empty cans/ Street. 4. What/we do/save/our Earth? 5. Which/floor/your class? _______________________________________________________ _______________________________________________________ _______________________________________________________

Chỉ cần ghi đáp án thôi nhé III. Em hãy đọc đoạn hội thoại sau và chọn từ thích hợp để điền vào chỗ trống. Hello - live - What’s - How - you - is Nam: Hello! Lan:________________ ! Nam:__________ your name? Lan: My name is Lan. And____________ ? Nam: My name is Nam. Lan: Where do you__________ , Nam? Nam: I live in Thai Ha Street. Lan: ____________ your house near your school? Nam: No, it isn’t. Lan: do you often go to school? Nam: I often go to school by bike. IV. Hãy chọn đáp án đúng A, B, C, hoặc D để hoàn thành những câu sau đây. 1. She usually has_____________ at 7 p.m. A. Dinner B. lunch C. breakfast D. supper 2. Nine fifteen is ________________ . A. a quarter past nine B. a nine past quarter C. a nine to quarter D. a quarter to nine 3. Jane enjoys listening____________ music every morning. A. At B. to C. by D. on 4. Nam is smaller than me but Long is________________ . A. the smaller B. small too C. the smallest D. smaller than 5. It is about 3 kilometers my house __________ my school. A. from/to B. to/from C. at/to D. to/at 6. Mrs Hoa_____________ to work by motorbike every day. A. Comes B. goes C. arrives D. runs 7. He would like some bread. He’s____________ . A. Happy B. hungry C. thirsty D. good 8. My mother______________ to me every month when I was in London. A. Writes B. wrote C. is writing D. write 9.__________ does she go on holiday? She goes by train. A. Which B. What C. How D. Where 10. We are going to go________________ this Sunday afternoon. We like water very much. A. Running B. swimming C. skiing D. skating

Rút gọn $(x + 2y)^{2}$ + $(x -2 y)^{2}$

II. Em hãy sắp xếp các câu ở cột A cho phù hợp với nội dung của các câu ở cột B A B 1. She likes going shopping. a. No, they aren’t. Mine are over there, 2. What are you going to do next Sunday? b. It is made in Japan. 3. Are these your books? c. But I like going swimming at the weekend. 4. She has a new motorbike. d. He has lunch at 11.30. 5. What time does he have lunch? E. I am going to visit my grandparents.