Cho 128 gam Fe2 SO4 3 lần tác dụng với NaOH với hai thể tích 0,2 lít tính nồng độ mol NaOH khối lượng NaOH

bài 1 A=3+ 7+11+...+403 bài 2: tính nhanh a, 125.16 b, 37.101 c,113.29+29.87 d,8.3.219+6.573.4+208.2.12 e, 123.67+86.33+33.114+67.77 bài 4 a,210-6x= 174 b, 115-5x:3=100 c, [ x- 18] : 5+17= 21 125+5 [x-1]= 155

Write questions for these answers 1. The teacher gave the students some scientific books =>What kind of 2. All the children are interested in the performing animals . =>What 3. She borrows this science book to read more about M.Curie’s life . =>Why 4. Writers and musicians have mentioned the "ao dai" in poems, novels and songs. =>What 5. Lan has just bought a pair of sandals made in China. => What kind 6. She borrowed some of my English books. =>Whose 7. Phong is very kind and friendly. =>What 8. I want the red pen over there. =>Which 9. She didn't come to the party because she got a bad cold. =>Why 10. Thu can get there in only 10 minutes. =>How Mọi người giúp em vs ạ ! Em cảm ơn!

Cho (3x^2)/2+y^2+z^2+zy=1 Tim GTLN, GTNN cua A=x+y+z

Tìm số nguyên n để: (2n + 1) : (6 - n)

mik đang gấp giúp mới nahnh nhanh

11. He went to his house, lied down on the bed, and (sleep) ……………… right away. 12. I (buy) ……………… the ticket yesterday. I am (go) ……………… Dalat tomorrow. 13. Tim (attend) ……………… the meeting at school at the moment. 14. He (have not) ……………… English for 2 years. 15. Our class (start) ……………… at 9am. 16. I always (brush) ……………… my teeth before I go to bed. 17. I (study) ……………… English since I was 21. 18. He was listening to music when his boss (come) ……………… yesterday. 19. I (have do) ……………… all the homework all afternoon. 20. She (wait) ……………… you for all day. 21. He wasn’t working when his boss (call) ……………… him yesterday. 22. She (be) ……………… at her boyfriend’s house yesterday morning. 23. I (talk) ……………… to my father at the moment. 24. We (be) ……………… in Nhatrang on their summer holiday last year. 25. The sun (rise) ……………… in the east. 26. He (meet) ……………… his old friend near his house yesterday. 27. The World Cup (take place) ……………… every four years. 28. They (play) ……………… in the garden at 4 pm yesterday. 29. She was watching a picture while her mother (cook) ……………… soup. 30. Anne was riding her bike to school when Peter (see) ……………… her yesterday

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viết 1 đoạn văn 12 câu có sử dụng câu bị động và thành phần khởi ngữ làm rõ Vũ Nương yêu chồng thương con,gạch chân yêu cầu TV

Ngâm 1 lá Al trong 500ml dd AgNO3 0,36M. Sau một thời gian phản ứng thấy khối lượng lá Al tăng lên 5,94g a) Tính khối lượng Al đã phản ứng b) Tính Cm của các chất trong dd sau phản ứng biết Vdd ko đổi