Oxi hóa hoàn toàn 12,8 gam đông trong bình khí oxi, sau phản ứng thu được một chất rắn màu đen là đồng(II)oxit. Tính khối lượng đồng(II)oxit thu được sau phản ứng( tính bằng 2 cách khác nhau). ( Cho: Cu=64, O=16)

A= |x+7|+14 mọi người giúp em vs em đang cần gấp ạ

Rewrite the sentences, using the words in the brackets. Change other words in the sentence if necessary. 1. The new restaurant looks good. It seems to have few customers. (however) ...................................................................................................................... 2. We planned to visit Petronas in the afternoon. We could not afford the fee. (however) ........................................................................................................................ 3. Mary was sick. She didn’t leave the meeting until it ended. (despite) ....................................................................................................................... 4. We live in the same street. We rarely see each other. (in spite of) ........................................................................................................................ 5. I couldn’t sleep. I was tired. (in spite of) ........................................................................................................................ 6. They have little money. They are happy (despite) ........................................................................................................................ 7. My foot was hurt. I managed to walk to the nearest village. (although) ........................................................................................................................ 8. I’ve been too busy to answer by email. I’ll do it soon. (nevertheless) ........................................................................................................................ 9. We had planned to walk right round the lake. The heavy rain made this impossible. (although) ........................................................................................................................ 10. I got very wet in the rain. I had an umbrella. (although) ........................................................................................................................

lm nhanh hộ mk nha . nhớ làm đúng đó

13.he had an accident since he was careless because of 14.she started to study english when she was ten she has

Có 2 lọ thuỷ tinh, một lọ đựng khí oxi, một lọ đựng không khí. Hãy nêu cách phân biệt 2 lọ.

Ở đậu hà Lan có 2n=14. Hợp tử của loài trải qua NP.Tính số NST,cromatit, tâm động qua mỗi kỳ của NP

Hoàn lưu gió tác động mạnh tới khí hậu khu vực Đông Nam Á và Nam Á là

Tìm x;y là số nguyên biết : a) (x-3) . (y+5) =-17 b) (x+1). (xy-2)= 11 c) xy -7x +y =-22 d) xy-3x +y= -20 giúp mk với ạ mk sẽ vote 5 sao nhé

III. Fill in the blank with a suitable word. “Do you like sport?” You can hear this (1)...................very often. Many people answer “yes, I do”, and (2)........................... think about watching a game of football at a stadium, or (3)....................... TV while sitting in a comfortable armchair. But watching sport events and going in for sport (4)........................ two different things. Let‟s hope that you prefer the second. Sport holds (5).......................... important place in our life. When you listen to the radio early in the morning, you can always (6)..................... sports news. When you open a newspaper, you will always find (7) .....................about some game or other or an article about your favourite kind of sport. Especially interesting stories are (8)......................... famous men or women in the world of sport, how they became champions and about (9)....................... plans for the futures. Television programmes about (10).............. are also very popular, and you can watch something interesting practically every day.