1.đun nóng 6,54g hỗn hợp Al và S trong điều kiện không có không khí,đến phản ứng hoàn toàn thu được hỗn hợp chất rắn X.Cho X tác dụng với dung dịch HCl dư thu được 3,36 lít hỗn hợp khí ở đktc

a)Tính % theo khối lượng của Al trong hỗn hợp ban đầu

b)đốt cháy hỗn hợp X cần bao nhiêu thể tích không khí,biết rằng Oxi chiếm 20% thể tích không khí

cho 11,2g Fe vào 200ml dung dịch hỗn hợp Cu(NO3)2 0,6M và AgNO3 0,4M sau phản ứng xảy ra hoàn toàn thu được m gam chất rắn.Tính giá trị của m

mọ người giúp mình với ạ >.<

cho H2 qua ống đựng 16g CuO nung nóng sau phản ứng thu được chất rắn x có khối lượng là 14,4g.Tính hiệu suất phản ứng giữa H2 vá CuO

2. Edna won’t leave the house under any circumstances. (will) → Under...leave the house.

3. If the river rises any higher, the town will be flooded. (rise) → Should ..., the town will be flooded.

4. If you’d paid on time, you wouldn’t have been cut off. (paid) → Had ...,you wouldn’t have been cut off.

5. He had just recovered from flu when he caught a bad cold. (sooner)→No...from flu than he caught a bad cold.

6. He took such a long holiday that he forgot how to do this job. (did) →Such a long holiday...that he forgot how to do this job.

7. They managed to get our attention only by shouting and waving their arms. (manage)→Only by shouting and waving their arms...to get our attention.

8. He only asks for help when he is really desperate. (ask) →Only when he is really desperate...for help.

9. If I see him, I’ll give him your message. (should) →I’ll give him your message...him.

10. Tom never seems worried about his future. (seem) → Never...worried about his future.

11. I’ve never had such fun anywhere else. (else) →Nowhere...such fun.

12. Lynn didn’t realize that her mother was so worried about her. (realize) →Little...that her mother was so worried about her.

13. The army marched forward into battle. (marched) →Forward...into battle.

14. Her parents and her friends warned her not to go alone. (as) →Her parents warned her not to go alone,...friends.
15. She sang so well that she was offered a record deal. (sing) →So...that she was offered a record deal.

16. Unemployment hasn’t been at such a high level at any time since the 1930’s. (been) → Not since the 1930’s...at such a high level.

17. I only watch television if I don’t have anything else to do. (do) →Only when I have nothing else to do...television.

18. She’s barely finished drying her hair when her first guests arrived. (had) →Barely...drying her hair when her first guests arrived.

19. He didn’t thank me once for feeding his cat. (once) →Not...me for feeding his cat.

20. If there had been a phone nearby, he would have called an ambulance. (there) →Had...nearby, he would have called an ambulance

Các bạn giúp mink với nha

Dear friend,
Do you know next Thursday will be a day of eager anticipation to me? It is then the day before my fourteenth birthday. I have been looking forward to the party for at least two months. Everything is supposed to be perfect for that day: balloons, candles and tasty dishes, and music. There will be a barbeque of magnificent proportions. Miraculously, an enormous ice cream cake will be delivered with eight large pepperoni pizzas. Needless to say, I am excited. It is to be my first party at our new house.
I'm looking forward to seeing you come, that'll bring more life to this special event of mine.
Best wishes,

(your name)

sn nhớ mời mink với nha

1.Ở điều kiện tiêu chuẩn 11,2l hỗn hợp khí O\(_2\) và N\(_2\) có khối lượng 14,8g.Tính thể tích của mỗi khí.

2.Chất X tạo hợp chất với O\(_2\) là : XO

Chất X tạo hợp chất với H\(_2\) là :XH\(_3\)

Viết công thức của hợp chất tạo bởi X và X

Nhờ các bạn giúp mink nha