K
Khách

Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.

10 tháng 7 2017

Câu I bạn đã đăng,mk làm r nhé.

LINK: Câu hỏi của Nguyễn Quỳnh Như - Tiếng anh lớp 9 | Học trực tuyến

II) ADJ

1:Excited

2:Interesting

3:Developed

4:Fascinating

5:Fascinated

6:Boring ; Bored

7:Healthy

8:Beautiful

9:Worried

10:Boring

11:Exciting

12:Successful

13:Competitive

14:Good

15:Excited

16:Amazed

17:Happy.

~GOOK LUCK~

10 tháng 7 2017

RELATIVE PRONOUNS / RELATIVE ADVERBS

1. whose

2. who

3. which

4. which

5. whose

6. which

7. whose

8. where

9. which

10. whom

12. on which

13. where

14. whose

15. whose

16. whose

17. where

18. who

19. on which

20. whose

CAUSATIVE FORM

1. The boss had the letter typed by the secretary.

2. The boy had a picture drawn.

3. The master had the floor cleaned.

4. They had their luggage carried upstairs.

5. He has his bicycle fixed by his brother.

6. My father had this door repainted.

7. His mother had those chairs cleaned.

8. She had all her clothes made in Ho Chi Minh City.

9. My mother has the roses watered every day.

10. He has his car washed twice a month.

11. He will have his car washed.

12. He is going to have his video repaired by an electrician next week.

10 tháng 7 2017

~REWRITE SENTENCE~

1.Because of a traffic jam,the students arrived late.

2:Because of the heavy traffic,I can't drive fast.

3:Because of the large stream,they had to choose another way....

4:Because of his impoliting sentence,he was purnished.

5:Because of starting giame,Jan was worried.

6:Because og noise,he couldn't sleep.

7:Because of being very hurried,he didn't wait for us.

8:Because of heavy traffic,we were late for the meeting.

9:Because of his lazineess,Tom gets bad marks.

10:Because he was old,he couldn't continute to work.

11:We had to stay at home because the weather was bad.

12:Because of good behaivior,evryone loves her.

10 tháng 7 2017

UNREAL CONDITION

1) If my father was here now, he could help you.

2) If the children went to the circus, they would see the performing animals.

3) If the buses weren't full up, they would stop.

4) If I were good at English, I could read this book.

5) If he wasn't tired, he could score a goal.

6) If they were at home today, they would meet their aunt.

7) If Peter didn't drink too much coffee, he could sleep.

8) If the weather was nice today, we would go to the zoo.

9) If the boy had some books, he could write that composition better.

10) If I knew his address, I could visit him.

11) If we had a bicycle, we could go there for a picnic.

12) If tickets weren't expensive, we would visit Hanoi.

TENSES AFTER WISH

1) I wish the referee were fair.

2) They wish the water wasn't polluted.

3) I wish I knew German and Spanish.

4) They wish they had a sightseeing ride about London.

5) I wish they would come with us.

6) I wish she wouldn't leave for France next month.

7) I wish you could come to the party.

8) I wish we had a torch.

9) I wish I didn't have to work today.

10) I wish I wouldn't have to work tomorrow.

11 tháng 7 2017

I.

1. B. museum

2. D. important

3. C. impression

4. C. politeness

II.

5. C. missed

6. D. gauge

7. A. intended

8. B. organize

III.

9. C. impressed

10. B. invite

11. C. while

12. A. to leave

13. D. widely

14. B. knowledge

15. C. annoyed

16. B. from

14 tháng 11 2021

a) \(k=-5\)

b) \(-5x=y\)

c)  x             -4                 -1                2                   3

     y             20                 5               -10               -15

Tìm x xong rồi tìm y

3 thì làm kiểu gì cũng được

PTHH: \(Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\)

Ta có: \(\left\{{}\begin{matrix}m_{H_2SO_4}=588\cdot5\%=29,4\left(g\right)\Rightarrow n_{H_2SO_4}=\dfrac{29,4}{98}=0,3\left(mol\right)\\n_{Al_2O_3}=\dfrac{20,4}{102}=0,2\left(mol\right)\end{matrix}\right.\)

Xét tỉ lệ: \(\dfrac{0,2}{1}>\dfrac{0,3}{3}\) \(\Rightarrow\) Al2O3 còn dư

\(\Rightarrow n_{Al_2\left(SO_4\right)_3}=0,1\left(mol\right)=n_{Al_2O_3\left(dư\right)}\)

\(\Rightarrow C\%_{Al_2\left(SO_4\right)_3}=\dfrac{0,1\cdot342}{20,4+588-0,1\cdot102}\cdot100\%\approx5,72\%\)