Предмет: Химия, автор: Аноним

серная кислота взаимодействует с каждым из двух оксидов:
1) CuO и CO2

2) CaO и SiO2
3) CO и Na2O 4) MgO и Al2O3

Ответы

Автор ответа: IQambrozio

0

Правильный ответ 4

H2SO4 + MgO → MgSO4 + H2O

3H2SO4 + Al2O3 → Al2(SO4)3 + 3H2O

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Русский язык, автор: anastasiyaaa15

помогите пожалуйста, мне нужно олимпиаду доделать, умоляю

6 лет назад

Предмет: Английский язык, автор: meskenova06

Помогите !

1. Choose the right variant: He thought that he ___ in a bank.
A) Worked

B) Work

C) Is working

D) Works

E) Am working

2. Complete the sentence: Please, clean … blackboard:

A) The
B) An
C) A
D) Those

E) Some

3. Fill in the blank: She reads …. books.

A) Many

B) Little

C) Much

D) Every

E) One

4. Choose the right variant…… do you live?

A) Where
B) Whom
C) Which
D) What
E) Who

5. Complete the sentence:Please, bring me … apples.

A) Some
B) Anybody
C) Nothing
D) Someone
E) One

6. Complete the sentence: We arrived … England last week.

A) in
B) on
C) to
D) for
E) at

7. Choose the right variant : We … to Ireland for our holidays last year.

A) Went
B) Going
C) Goes
D) Have gone

E) Go

8. Complete the sentence. The building … last year:

A) Was built
B) Built
C) Build
D) Are building
E) Were built

9. Complete the sentence: I … be in time for work:

A) Must
B) Can
C) Am able to
D) May
E) Could

10. Choose the right variant: Is that my key, or is it ?

A) Yours

B) The yours
C) The your’s

D) Are you

E) Your

11. Choose the right variant: What are you going to do ____ afternoon?

A) This

B) His

C) It

D) Same

E) Its

12. Complete the sentence: We haven’t got … bread

A) Any

B) Some
C) The more
D) No
E) Something

13. Choose the right variant: Lion is the …. Animal

A) Strongest

B) Most strong

C) As no strong as

D) Stronger

E) As strong as

14. Choose the right variant: We were ____ late

A) Terribly

B) Terrible

C) More terrible

D) Much terrible

E) Terribler

15. Choose the right variant: When I looked round the door, the baby … quietly

A) Was sleeping

B) Were sleeping

C) Are sleeping

D) Slept

E) Is sleeping

16. Complete the sentence: The Tower of London … with the royal dynasties:

A) Is connected
B) Connected
C) Is connecting
D) Will connect
E) Connects

17. Choose the right variant: When I ____ home I met my brother.

A) Was going

B) Gone

C) Go

D) Goes

E) Was gone

18. Complete the sentence: How long …. at the airport?

A) Have you worked

B) Does you work

C) Would you work

D) You have worked

E) Does you worked

19. Choose the right variant: He picked up the letter ____ on the floor.

A) Lying

B) Lain

C) Having lain

D) Lay

E) Laid

20. Choose correct noun in plural form:

A) Dresses

B) Dresess

C) Dressen

D) Dressis

E) Dress

21. Complete the sentence: They … their English in the morning:

A) Have

B) Has

C) Is having

D) have had

E) Was having

22. Choose the right variant: Peter and ____ are students.

A) I

B) Them

C) Him

D) Her

E) Us

23. Choose the right variant: I couldn’t see ___ eyes because she was wearing dark glasses.

A) Her

B) My

C) Their

D) Mine

E) His

24. Complete the sentence:… father is an architect.

A) His

B) They

C) She

D) Us

E) Hers

25. Complete the sentence: It costs four … dollars.

A) Hundred

B) A hundred

C) Hundreds

D) Hundredses

E) The hundred

6 лет назад

Предмет: Геометрия, автор: Аноним

подай частку 14⁷÷14⁵ у вигляді степеня

6 лет назад

Предмет: Геометрия, автор: LAIRON

Определите вид треогольника если высоты равны 3см, 2.5см и 5 см

10 лет назад

Предмет: Математика, автор: Zeny2002

В мешке 90 кг сахара.Когда продали 12 одинаковых пакетов в мешке осталось 56 кг сколько килограммов сахара в одном пакете.

10 лет назад