giúp mình vớiii ạ 😭 hỗn hợp E gồm 2 peptit mạch hở: tetrapeptit X (Gly3Ala) và pentapeptit Y (Gly2Ala3). Đốt cháy hoàn toàn m(g) E cần 0,6825 mol oxi vừa đủ, thu được N2, CO2 và 0,505 mol H2O. Tính m?

Giúp mik nhé mik đag cần rất gấp

Viết đoạn văn (15 câu ) nêu cảm nhận về hình ảnh của người lính trong bài thơ tiểu đội xe không kính

Nêu thao tác để thêm cột nằm bên trái của bảng, thêm hàng bên dưới của bảng, thêm hàng ở giữa của bảng.

Đề: mái trường mến yêu Hãy viết một bài văn hoàn chỉnh cho đề bài trên Càng dài càng tốt Lưu ý: ko chép mạng

CÂN BẰNG PHƯƠNG TRÌNH HÓA HỌC. KNO3 → KNO2 + O2

Tìm những điểm chung trong sự phát triển của các nước tư bản trong giai đoạn chuyển sang chủ nghĩa đế quốc. Giải giúp mik vs ạ

Giúp em với ạaaaaa. câu C nhaaaaa

4 điện tích đặt 4 đỉnh hình vuông cạnh a xđ điện trường tại điện tích điển q và lực tổng tác dụng lên q

Bài 1: Điền từ thích hợp để hoàn thành các câu sau. 1. ________have you give up smoking? For about two years. 2. _________place is more densely populated – Ha noi or Ho Chi Minh City? 3. _________broken Jane’s favorite vase? Her brother did it. 4. _________ does Mr. Brown do? He’s a reseacher. 5. _________ethnic groups are there in your country? 6. _________ is your grandmother? She’s ninety years old. 7. _________does your English teacher looklike? She’s young and pretty. 8. _________water should we drink every day? 9. _________did you use to go to school? I used to go on foot. 10. _________is it from here to the nearest police station? 11. ________songs is this singer performing? He is performing Trinh Cong Son’s songs. `12. ________ was Ms Ann born? She was born in a small village. 13. ________did you have for breakfast?- Bread and eggs. 14. ________didn’t you invite Jim to the senior prom? 15. ________do they meet each other? - Almosteveryday. Bài 2 . Điền một từ thích hợp vào chỗ trống để hoàn thành những câu hỏi dưới đây 1. _____you like chocolate? 2. When ________ you begin studying here? 2 years ago. 3. Which movie_________ you watch last night? 4. How far __________it from here to the town center? 5. How long ___________Ann and James been friends with each other? 6. What________ you do tomorrow? I will just lie in my bed and read books. 7. Who _________ you pick up yesterday? 8. How old__________ they? 9. How many rooms __________ there in your house? 10. Who___________ sleeping in your room? 11. ___________you found your keys? No, I haven’t found them yet. 12. _________you travel to a mountainous area last summer? 13. How often ___________Ann visit her grandmother? 14. What _________you use to do before your retirement? 15. Where________Jim going to? He is going to the library? BÀI 3: Điền mạo từ ‘a’, ‘an’ hoặc 0 vào chỗ trống sao cho thích hợp. 1. She asked me for ___ information about the meeting. 2. They will move to ___ mansion next month. 3. I’d like ___ grapefruit and ___ orange juice. 4. ___award was given to Jim yesterday. 5. We read ___ books and play ___ games when we have free time. 6. Jim doesn’t want to borrow ___ money from anyone. 7. My friend and I threw ___ party last week. 8. It was ___ honor to be invited here today. 9. I’ve bought ___ umbrella for my sister. 10. My family often have____ eggs for breakfast. 11. Would you like______cup of tea? 12. My brother doesn’t like ______ cats. 13. Is there __________post office here? 14. I spend _________hours on my DIY project. 15. Mr. Peter used to be ___________famous vet. bài 4 Elephants need help The elephant is (1) _______ unique cultural symbol of Tay Nguyen and Dak lak is considered the land of (2) ________ elephants in Vietnam. In the past.Tay Nguyen used to have large (3) __________ of elephants living in the mountains. They helped (4) ______locals and they lived in harmony with people. However, the elephants in Tay Nguyen are in (5)_____now. In recent years, climate changes have decreased the area of natural forests.Illegal deforestation has also threaten the elephants. Besides, illegal hunting for tusks, bones and tail hair has killed many of (6) __________ animals, (7) ________can we protect the elephants? It is important that both the authorities and the local people joined hands to save the elephants from (8) ______. 1. A. a B. an C. the D. 0 2. A. a B. an C. the D. 0 3. A. shoals B. schools C. herds D. flocks 4. A. a B. an C. the D. 0 5. A. safe B. guard C. danger D. protection 6. A. a B. an C. the D. 0 7. A. How B. What C. Who D. Why 8. A. extinction B. protection C. destruction D. conservation