Cho 300 ml dung dịch X ( NaOH 0,1M và Ba(OH)2 0,025M) tác dụng với 200 ml dung dịch H2SO4 x M thì thu được m gam kết tủa và 500 ml dung dịch Y có pH=12. Giá trị của x và m lần lượt là A. 0,1M và 1,7475 gam B. 0,1M và 4,66 gam C. 0,025M và 1,7475 gam D. 0,025M và 1,165 gam Câu 28: Cho 150,0 ml dd NaOH 0,15M vào 100,0 ml dd chứa HCl 0,1M và H2SO4 0,05M thì thu được dd X. Vậy pH của dung dịch X là: A. 13 B. 7 C. 12 D. 2

Mọi người giải hộ em ạ , em xin cảm ơn ạ

tìm số tự nhiên x,biết (255-x)-67=189-67

TÓM TẮT NGẮN NGỌN LẠI GIÙM EM , KHÔNG LƯỢT BỎ MỐC THỜIGIAN Ạ ❤🙆 Mr Vy and Mrs Tuyet are farmers. They have a field and a buffalo. In the early morning, Mr Vy gets up and leads the buffalo to the field. He works hard on his field from 5:30 to 10:30. He has lunch with his family at 11:30 then has an hour’s rest. In the afternoon, Mrs Tuyet goes to the field with him. She does the transplanting while her husband pumps water into the field. They finish their work at 6 p.m and have dinner at about 7 p.m. After dinner, they usually watch TV and then go to bed at 10 p.m. Sometimes they go and see their neighbors and chat about their work, their children,... They love their work and their children as well.

chia 1 số cho 15 dư 6. hỏi số đó có chia hêts cho 5 ko, có chia hêts cho 3 ko

Viết đoạn văn nói về sở thích của bạn dựa vào

tính √( 7 - √6 ) - √( 7 + √6 )

a) 1 < Giá trị tuyệt đối X [X] < 3 B) ( 5 - x ) . ( 8 - x ) < 0

Giải chi tiết giúp mình câu này.Cảm ơn mn

31.If I ______ in your shoes, I’d take it easy and try to forget it. a.are b.am c.were d.have 32.. They keep changing the decoration of the shop ______they can attract more young people. A. so that B. because C. although D. when 33.Minh is ________the most successful student in my class. A. so long B. by how C. by far D. so now 34.My grandfather is the____oldest artisan in the village; Ngoc's grandfather is the oldest A. first B. second C, most D. one 35.. Lan couldn't decide________to work with on the project. A. who B. what C. how D. when 36. . She has taught English here ________ 10 years. A. in B. for C. since D. from 37. I have always been ____ by the beauty of the city. a. attraction b. attracted c. attractive d. attracting 38. These basket are woven by _______ a. artists b. worker c. artisans actors 39. The Perfume Pagoda _ during the reign of Le Thanh Tong in the 15th century. a. built b.was built c. is built d. were built 40. My leg started to hurt when I ___football. a. played b. am playing c. had played d. was playing