Предмет: Химия, автор: miroslavatonki

Народ, помогите, пожалуйста!!! СРОЧНО!!!Выписать только оксиды и разбить на 4 группы (кислотные и т.д)
CaO
NaOH
CO2
H2SO3
CaCe2 (калий хлор, если не понятно написала)
FeCe2
FeCe2
Zn(OH)2
N5O5
Al2O3
Ca(OH)2
CO
N2O
FeO
SO3
Na2SO4
ZnO
CeCO3
Mg2O7
C4O
KOH
F(OH3)

Ответы

Автор ответа: Pavetta
0
Оксиды: CaO  CO2  N2O5  Al2O3  CO  N2O   FeO  SO3   ZnO  C4O 
Основные оксиды: CaO  
Амфотерные оксиды: Al2O3   FeO   ZnO
Кислотные оксиды ( с высшей валентностью) : CO2  N2O5 SO3 C4O
Кислотные оксиды ( с низшей степенью окисления) : CO N2O 
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Reading

Task 1 Read the text and do the task below



We go to the theatre to see a play, that is to say, a performance given by actors and actresses. A play of a serious character, dealing with important human problems is called a tragedy. A play of a humorous, lighter character is a comedy (or a farce). Dramatists are called playwrights nowadays and there are no longer such great dramatists as Shakespeare or G. B. Show.

If we want to go to a theatre we buy tickets at the box-office and show them to the attendant at the entrance. In the building there is a hall, a large foyer and a cloak-room where we leave our overcoats, hats, etc. The audience can walk in the foyer in the intervals.

Many doors lead to the auditorium consisting of stalls, boxes and balconies. In front of the auditorium there is a curtain separating it from the stage. The curtain rises when the play begins and falls at the end of each act.



Mark the sentences True (T) or False (F).

1. We go to the theater to see a play. _________________________ [1]

2. A play of a humorous, lighter character is not a comedy. _________________________ [1]

3. Dramatists are called playwrights nowadays _________________________ [1]

4. We don`t buy tickets at the box-office _________________________ [1]

5.The audience can walk in the foyer in the intervals. _________________________ [1]

6. The curtain doesn`t rise when the play begins _________________________ [1]

7. There is a curtain separating the auditorium from the stage _______________​