Ca -> CaO -> CaCl -> Ca(OH)2 -> CaCo3
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ХимияАвтор:
highbeamlxlw1)2Ca+O2=2CaO
2)CaO+2HCl=CaCl2+H2O
3)CaCl2+2NaOH=2NaCl+Ca(OH)2↓
4)Ca(OH)2+K2CO3=2KOH+CaCO3
Автор:
ellorypae62Ca +O2=2CaO
CaO+HCl=CaO=H2O
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sassienekwДобавить свой ответ
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AEO ”NAZARBAYEV INTELLECTUAL SCHOOLS”
TASKS FOR COMPETIVE SELECTION OF STUDENTS
English, 7 grade
1. Will you go to the stadium if you … a ticket?
A) have
B) had
C) have had
D) would have
E) will have
***
2. The soup was … cold.
A) too
B) to
C) enough
D) two
E) not to
***
3. … eggs in this cake?
A) Are there any
B) Is there any
C) Are there some
D) Is there some
E) Some
***
4. You … to a word … .
A) haven't listened /I've said
B) listened /I haven't said
C) didn't listen / I say
D) listened /saying
E) listened/says
***
5. I can't believe that … the news.
A) you haven't read
B) you didn't read
C) you don't read
D) you read not
E) read
***
6. What’s the matter? My car … .
A) has just been stolen
B) was just stolen
C) is just stolen
D) being slealen
E) steal
***
7. My sister … to hospital tomorrow.
A) will be taken
B) is being taken
C) was taken
D) token
E) taken
***
8. The cake … so nice.
A) smells
B) smelling
C) smelt
D) is smell
E) is smells
***
9. The conference room … at the moment.
A) is being used
B) was being used
C) had been used
D) used
E) using
***
10. Ann didn’t know what … .
A) to answer
B) answering
C) answer
D) answerring
E) answered
***
11. Don’t forget … everything I asked for.
A) to buy
B) buying
C) to buying
D) bought
E) buy
***
12. Tom said he … to see a new film.
A) wanted
B) has wanted
C) will want
D) wanted
E) have wanted
***
13. Nick demanded … the window.
A) to close
B) closed
C) to be close
D) closing
E) closes
***
14. They’ll go to the restaurant if they … a table in advance.
A) reserve
B) would reserve
C) reserved
D) reserving
E) will reserve
***
15. Did you find … who took your coat?
A) out
B) in
C) about
D) up
E) over
***
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