â : Viết phương trình
H2SO4 + NaOH = H2O + NaSO4
b: H2SO4 + NaOH + H2O +NaSO4
Theo đề ta có :
n H2SO4 = m H2SO/ M H2SO4 = 150/98 = 1,5 ( mol )
theo pt ta có : n H2SO4 = n NaOH = 1,5 ( mol )
Vay : V NaOH = n . 24 = 1,5 . 24 = 12l
khối lượng chất : m NaOH = n . M = 1,5 . 70 = 105g
mk giải theo những gì mình bít ....mk ko phải chuyển hóa
Chon dap an dung: ( So sanh )
I am ________ at music than my old sister.A. good B. better C. goodest D. the best
2. Of the four dresses, which is _______expensive?
A. the best B. the most C. the more D. the greater
3. The larger the apartment, the_______ the rent.
A. expensive B. more expensive C. expensively D. most expensive
4. The faster we walk,_______ we will get there.
A. the soonest B. the soon C. the more soon D. the sooner
5. “ Why did you buy these oranges? ” “They were _______ I could find. ”
A. cheapest B. cheapest ones C. the cheapest ones D. the most cheapest
6. Peter wanted to win the race. He ran ______.
A. so fast as he can B. fast as he could C. fast as he can D. as fast as he could
7. It is ______ to talk about a problem than to solve it.
A. more easier B. easiest C. easier D. easy
8.You have got a scholarship; you are luckier______.
A. as I do B. than I am C. than I have D. than I do
9. The longer hours you work, ______.
A. the less tired you'll be B. you'll be more tired
C. the more tired you'll be D. the most tired you'll be
10. Nowadays, young people ______.
A. don’t read as many as their parents used to
B. don’t hardly read much as their parents did
C. do more reading as their parents used to
D. don’t read as much as their parents used to
11. The more you talk about the situation, ______.
A. it seems the worse B. the worse it seems
C. it seems worse D. the worse does it seem
12. “Could you talk ______? I'm learning my lessons.”
A. more quietly B. as quietly C. most quietly D. so quietly
13. John said that no other car could go ______.
A. fastest than his car B. faster like his car.
C. so fast like his car D. as fast as his car
14. The more you study, ______.
A. you will gain more knowledge
B. the more knowledge do you gain
C. you are the more knowledgeable
D. the more knowledge you gain
15. The longer he waited, ______ impatient he got.
A. the better B. better C. the more D. more
16. The harder you try, ______ you get.
A. the best B. good C. the better D. better
Viết lại câu :
1. What a pity I didn't see the match on TV last night.
=> I regret________________________________________
2. They got lost because they didn't have a map.
=> If _____________________________________________
3. People say a new hospital will be built soon
=> A new hospital ________________________________
4. It's impossible to plant trees in this soil.
=>Trees __________________________________________
5. I'm sorry I missed your birthday party
=> I wish ____________________________________________
Describe a memorable shopping experience.
You should say:
-When it was
-Where you were
-What you bought
and explain why it was a memorable ễprience
Các bạn ơi, giúp mình với. Mình cần gấp lém. Các bạn chỉ cần viết 14 câu trở xuống cx được, làm ơn giúp mk nha, mình làm rồi còn học thuộc nữa nên các bạn giúp mk càng nhanh càn tốt nha.
Describe an actress/ actor.
You should say:
-What his/her name is
-what movies he/she has been in
-what he/she is your favorite actress/actor.
Các bạn giúp mình với nha. Mình cần gấp lắm. Các bạn không cần viết nhìu đâu chỉ cần viết giúp mình 12 câu thôi. Mong các bạn giúp đỡ. Mình cảm ơn trước nha.
câu bị động với thì hiện tại hoàn thành
1 Nancy has paid the bill
2 I have eaten a hamburger
3 I have opened the present
4 Ann had fed the cats
5 They have not read the book
6 You have not sent letter
7 They have not caught the thieves
8 We have done our homework
9 My friend has written a emails for 2 hours
10 They had finished their work
11 Our teacher have explained the english grammar
KHÔNG BIẾT MÌNH CHIA CÂU DƯỚI NHƯ VẬY ĐÚNG CHƯA? CHECK HỘ CÁI!
When I was at school, I never (think) thought that I (work) would work as a teacher of English in the future.
VIẾT LẠI CÂU
1. This chair is not comfortable and nor is the other one (neither)
_________________________________________________________________
2. The last film we saw was more frightening than this one (so)
__________________________________________________________________
3.Paul is very proud of his success (pride)
__________________________________________________________________
Give the correct form of the verbs in brackets. Giúp mình cần gấp. Thanks!
1. It's about time I(start).......... writing the report (require) by the teacher yesterday
2. You'd better (get)............ all the work (do)........... by 5 pm.
3. By the time my mother (return) tomorrow, I'm sure we (finish) painting the house
