1/ Cho 10,2 gam hỗn hợp K và K2O tác dụng hoàn toàn với H2O thu được 2,24 lít khí hirdo ( đktc ). Tính khối lượng từng chất trong hỗn hợp ban đầu. 2/ Cho 15,6 gam hỗn hợp Al và Al2O3 tác dụng hoàn toàn với H2O thu được 13,44 lít khí hirdo ( đktc ). Tính khối lượng từng chất trong hỗn hợp ban đầu.

Nêu pp thu được Cu tinh khiết từ hỗn hợp Al2O3, Fe2O3 và CuO

bài này làm thế nào vậy mọi người ơiiiii

Giúp mik với ạ Trình bày đầy đủ ra giúp mik nha

mn giúp mình với ạ, mình cảm ơn rất nhiềuuu

30đ vote 5sao . giúp mik 2 câu nhé

Giúp dệ tử với mấy sư huynh ơi : (

Các bạn ơi giúp mình với ạ 😿😿

Until World War II there were very distinct (1) (society) groups in British society. There was an upper class that included the (2) (aristocrat) and many people who lived on inherited wealth a middle class that could be (3) (divide) into upper middle class, middle class and (4) (low) middle class, and a working class that included both skilled and craftsmen and unskilled (5) (industry) workers and (6) (agriculture) laborers. The (7) (divide) between the classes were reflected in many aspects of life. Working – class children usually left school and went out to work at the age of 14. Upper class children were educated in private schools and formed the (8) (major) of students at university. Pubs were divided into public bars and saloon bars which were more (9) (expense) and more comfortable. Trains had first, second and third class (10) (carry). Theatres had a dress circle where theatre goers wore evening dress, and a gallery where the seats were cheaper and evening dress was not worn.

Choose A, B, C or D to indicate a meaningful sentence from the words and phrases given. 32. This time/ next week/ I/ be/ enjoy/ summer holiday/ beach. ……………………………………………………………………………. 33.will/ a new school/ The Government/ next month/ build/ poor children/for. ……………………………………………………………………………. 34. the film/ They/ on/ amount of / spent/ a huge. ...........................................................................................