Câu 1. CaCO3 bị lẫn một ít tạp chất là Fe2O3, Al2O3, SiO2. Nêu cách để thu được CaCO3 tinh khiết nhất giúp mk với plzzzz

Em hãy tách từ hỗn hợp nước ra dầu ăn?

Tìm giá trị lớn nhất của biểu thức sau: C=3-/2x -5/

Exercise 2: Choose the best answer: 1. In Vietnam, it is normally ________ in the South than in the North. A. hot B. hotter C. hottest D. hoter 2. The food is ________ than the last time I ate it. A. badder B. bad C. worse D. worst 3. Ho Chi Minh city is ________ than Hanoi. A. big B. bigger C. biggest D. biger 4. Her voice is ________ than her sister’s. A. beautiful B. more beautiful c. beautifully D. more beautifully 5. Her literature result is much ________ than it was last year. A. good B. well C. more well D. better 6. Cinderella danced ________ than any other girls at the ball. A. more graceful B. gracefuler C. gracefully D. more gracefully 7. This book is the ________ of all. A. bored B. boring C. more boring D. most boring 8. Mary speaks English very________ A. fluent B. fluently C. more fluently D. most fluently 9. Tom runs faster than John and David runs the ________ in the group. A. fast B. most fast C. fastest D. most fastly 10. There is nothing ________ than going swimming in hot weather. A. gooder B. good C. better D. best

1,CH2=CH-COOCH3 +H2O—-> 2, CH3-COO-CH=CH-CH3 +NaOH—-> 3, C2H5COO- C(CH3)=CH2+NaOH—-> Mn giúp mình với ạ :(((

giải giùm đi ạ đúng nheeeeeeeeeee

Tìm thành ngữ , tục ngữ có từ "nhạt" và từ "mật" . :3 .

Câu1: Căn bậc ba của 27 là: A -3 B. 3 C. 9 D. -9

Exercise 1: Rewrite following sentences so that the meaning stay the same. 1. According to me, English is easier than Maths. According to me, Maths........................................................................................ 2. She gets fat. She feels tired. The fatter............................................................................................................... 3. The black dress is more expensive than the white one. The white dress...................................................................................................... 4. The black car is cheaper than the red car. The red car............................................................................................................. 5. This is the most interesting film of all. No other films are................................................................................................. 6. No cars in the world are more expensive than Japanese ones. Japanese cars.........................................................................................................

Nhanh hộ e vs ạ! Cảm ưn mn nhìu