2FeS2 + 30HNO3 → Fe2(SO4)3 + H2SO4 + 30NO2 + 14H2O
\(2FeS_2+30HNO_3\rightarrow Fe_2\left(SO_4\right)_3+H_2SO_4+30NO_2\uparrow+14H_2O\)
giúp mình với các bạn ơi
cho các chất sau
SiO2, BaO,K2O,MgO,CuO,Al2O3,Fe2O3,SO3
chất nào tác dụng được với
a, H2O
b, dung dịch H2SO4
c,dung dịch Ca(OH)2
viết pt phản ứng nếu có
Chọn chất thích hợp hoàn hảo của PTHH :
R---->A----->B----->C----->BaCO3
1. The last time we went to the movies was two months ago.
-> We haven'
2. The journey to the village was very intersting to the boys
-> The boys felt
3. He bought such a lot of books that he couldn't read them all
-> So
4. I'm sorry I'm not able to go with you
-> I wish
5. He hasn't met her for over 15 years
-> It's
6. Spending the weekend in the countryside is very exciting
-> It's
7. My friends don't take part in the game
-> I wish
8. The doctor advised him to stay in bed for a few days
-> He
9. They won't come with us
-> We wish
10. She seldom write to me
-> I wish
11. Mai doesn't know how to use the internet
-> Mai wishes
12. There isn't a concert this weekend
13. I'm sorry. I'm not a doctor
-> I wish
14. We no longer write to each other very often
-> We used
15. My uncle smokes a lot. He is used to it
-> He is used
để đốt cháy hoàn toàn 0,74g CR A cần 1,12l khong khí chứa 20% O về thể tích. Sản phẩm là CO2, H2O và Na2CO3. trong đó có 2,24ml Co2 và 0,53g Na2CO3. Tìm CT của A ở dạng thực nghiệm
Viết một đoạn văn nói về tầm quan trọng của việc học tiếng anh bằng tiếng anh :3
Viết lại câu bằng các từ in đậm
1. I like chatting with my friends on internet.
2. People used the studium 3 years ago.
Bài 3. Hoàn thành các câu dưới đây bằng cách điền tiểu từ thích hợp vào chỗ trống.
1. We will set__________for Tokyo in the next few hours.
2. Everyone says that Jim takes__________his father but I think he is more like his mother.
3. Who will take__________ your position when you are on parental leave?
4. There are four of us so Peter cuts the cake_______four pieces.
5. I am going to buy a new bike, so I put my old one __________.
6. Remember to put the trash__________before the garbage truck comes.
7. You must take_________your hat before yu come into a temple.
8. I hate the way my manager shuts me_________when she disagrees with me.
9. What are you looking_________? My car keys.
10.Watch_______for the dog. Everyone says that it is a fierce dog.
: Viết lại các câu, bắt đầu bằng “ I wish”
1. I’d like to have a bigger house.
……………………………………………………………………………………………..
2. I’d like they to keep quiet.
……………………………………………………………………………………………
3. You have to clean the floor after meals.
…………………………………………………………………………………………….
4. I’m sorry that I didn’t do the homework last night.
…………………………………………………………………………………………….
5. It’s a pity that you didn’t tell me about that.
……………………………………………………………………………………………..
6. I regret staying up late last night.
……………………………………………………………………………………………..
7. I ‘m sorry that you can’t join in the trip with us.
……………………………………………………………………………………………..
8. The weather was very cold ,so we couldn’t go swimming.
……………………………………………………………………………………………..
9. You are making too much noise.
……………………………………………………………………………………………..
10. I ‘d love to speak many languages.
……………………………………………………………………………………………..
Viết lại các câu, bắt đầu bằng “ I wish”
1. I don’t have to study. - I wish ……………………………………….……………
2. We had a lot of homework yesterday.
I wish ……………………………………………………………………………….
3. It rains. . - I wish ……………………………………….………………………..
4. It was very cold last night. . - I wish ……………………………………….……..
5. They work slowly. . - I wish ……………………………………….…..…………
5. She doesn’t join in the trip. . - I wish ……………………………………….……
6. I am not good at English. . - I wish ……………………………………….………
7. He studies badly. . - I wish ……………………………………….………………..
8. He doesn’t like playing sports. . - I wish ……………………………………….…
9. I don’t have a computer. - I wish ……………………………..………….………
10. Today isn’t a holiday. - I wish ……………………………………….…………
11. I can’t sing this song. - I wish ………………………………………….…………
12. He was punished by his mother. - I wish ………………………………………….
13. They won’t come here again. - I wish ………………………………………….…
14. I may not go on a camping trip. - I wish ………………………………………….
15. We didn’t understand them. - I wish ………………………………………….…
16. I will be late for school. - I wish ………………………………………….………
17. The bus was late today. - I wish ………………………………………….………
18. She doesn’t like this place. - I wish ………………………………………….……
19. These students talked too much in class. - I wish …………………………………
20. I can’t play basket ball. - I wish ………………………………………….……….
Hãy viết 1 bài văn ngắn bằng tiếng anh cỡ 3 phút nói về Huế (Hometown). (Giúp mình với nha các bạn)
