Предмет: Химия, автор: dkudretberdi

ДАЮ 30 БАЛЛОВ!. Определите типы химических реакций и расставьте коэффициенты в следующих уравнениях реакций

Уравнения реакции Тип химической реакции

А. Zn + О2 → ZnO

B. Al + HCl → AlCl3 + H2

C. H2O2 → H2O + O2

D. Fe2O3 + HCl → FeCl3 + H2O

Ответы

Автор ответа: Lizzie2018

1

А. 2Zn + O₂ → 2ZnO — реакция соединения.

В. 2Al + 6HCl → 2AlCl₃ + 3H₂↑ — реакция замещения.

C. 2H₂O₂ → 2H₂O + O₂↑ — реакция разложения.

D. Fe₂O₃ + 6HCl → 2FeCl₃ + 3H₂O — реакция обмена.

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: Аноним

ЖДУ ПОМОЩИ РЕБЯТА СЕГОДНЯ СРООООЧНООООО !!!!!!!!!!!!! ОЧЕНЬ НУЖНО ПРОШУ КТО НИБУДЬ ОТЗОВИТЕСЬ УМОЛЯЮЮЮЮ, ПРОШУ, СЕГОДНЯ СРОЧНО НАДО ПЛЫИЗЗЗ !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1. Раскройте скобки, поставив глагол в нужную форму в Past Simple.

1) When I _______ in Manchester, I ______ in a bank. (live, work)

2) The police _____ me on my way home last night. (stop)

3) What ___ you ___ at the week-end? (do)

4) I _______ enough money to buy anything to eat. (not have)

5) We all _____ the party at 10 p.m. (leave)

6) I _____ the party very much. (enjoy)

7) When ___ Mr Edward ___? (die)

8) They _______ come because they _____ very busy. (not be able to, be)

9) She _____ her exams because she _____ very hard. (pass, study)

10) Yesterday I _____ to Birmingham to see a friend of mine. (go)

2. Раcкройте скобки, поставив глагол в нужную форму страдательного залога.

1) The house _______ in 1930. (build)

2) The new hotel _______ next year. (open)

3) If you kicked a policeman, you would _______. (arrest)

4) Many accidents _______ by dangerous driving. (cause)

5) During the night we _______ by a noise. (wake up)

6) Her new novel probably _______ into a number of foreign languages. (translate)

7) I ___ often ____ to parties. (not invite)

8) His car _______ last year. (not use)

9) How ___this word ___? (pronounce)

10) I think this dish _______ by children. (not eat)

3. Вставьте by или with.

1) This sweater was knit ___ my grandmother.

2) Have you ever been bitten ___ a dog?

3) The cheese was grated ___ a grater.

4) The paper was cut ___ a pair of scissors.

5) The task was given ___ our boss.

6) The poem is written ___ a pencil.

7) This tower was damaged ___ strong tornado last year.

8) These windows were broken ___ a stone.

9) The novel will be written ___ a new author.

10) The tree has just been broken ___ that car.

Выберите правильный вариант.

1. Which is ___ best hotel in this town?

a) a b) the c) – d) most

2. My dictionary is on ___ top shelf on ___ right.

a) the, the b) a, a c) the, – d) -, -

3. Do you want ___ apple or ___ banana?

a) a, a b) the, the c) an, a d) -, -

4. There was ___ interesting program on TV ___ last night.

a) the, - b) an, - c) -, the d) an, the

5. I’ve got ___ good idea.

a) - b) any c) the d) a

6. I don’t like _____ coffee without _____ milk.

a) -, a b) a, - c) the, the d) -,-

7. Don’t buy rice. We don’t need ___.

a) any b) him c) some d) one

8. I’m thirsty. Can I have ___ water, please?

a) any b) a c) some d) –

9. Do you know where___ Kalahari desert is?

a) a b) an c) the d) –

10. _____ Italian is a very beautiful language.

a) the b) an c) a d) –

11. I have known _____ Simpsons for _____ long time. They are _____ good people.

a) -, a, - b) the, a , - c) the, -, - d) -, a, the

12. _____ Spaniards talk rather quickly and expressively.

a) - b) an c) a d) the

13. He is at _____ loss when it comes to his son.

a) the b) a c) an d) –

14. You won’t go to the night club. It is out of _____ question.

a) the b) a c) - d) an

15. It was _____ love at _____ first sight.

a) - , - b) the , the c) a, a d) -, the

16. There is a gentleman in the hall _____ wants to see you.

a) who b) whose c) which d) whom

17.The book _____ is on the desk is not hers.

a) whose b) who c) which d) what

18. It’s the most interesting film _____ I have ever seen.

a) who b) that c) what d) whom

19. I could see him through the key _____.

a) whole b) hall c) holl d) hole

20. I stopped _____ buy some milk.

a) two b) too c) tow d) to

21. Which of the following words is odd?

a) clever b) stupid c) intelligent d) witty

22. Which of the following words is odd?

a) polite b) kind c) well-mannered d) rude

23. I don’t like ________. They always mock someone or something.

a) mockers b) mockors c) mockists d) mocksion

24. Find the best translation for the sentence: «Как насчет того, чтобы пойти в кино? »

a) How for going to the cinema?

b) How of going to the cinema?

c) How as for going to the cinema?

d) How about going to the cinema?

25. I _____ to escape from prison but he _______.

a) tryed, not managed b) tried, wasn’t manage c) tried, didn’t manage d) tried, didn’t managed

26. Rewrite the following statement into a question. – “She saw Mr Parker in the park the other day.”

a) Who did she saw in the park the other day?

b) Who she saw in the park the other day?

c) Who did she see in the park the other day?

d) Who saw she in the park the other day?

27. The text _______ yesterday but it _______ tomorrow.

a) wasn’t translated, will translated

b) wasn’t translated, will be translated

c) didn’t translated, will do translated

d) wasn’t translating, will be translating

28. Why ___ their child _____ after by a babysitter?

a) is looked

b) looked is

c) is looking

d) is look

29. His hand was bandaged ______ a braid.

a) by

b) in

c) from

d) with

30. The dress was ironed _____ my sister.

a) with b) from c) by d) on

2 года назад

Предмет: Русский язык, автор: onedev9595

Антоним к слову неволя

2 года назад

Предмет: Русский язык, автор: rabovalidia

Составте текст с прилагательными пожалуйста:разчетливый,лживые ,соевый,задумчивый,солевой,нулевой,питьевая,марлевая алюмининевая,неудачливые,вешневый ,обманчивая .Не ОБЯЗАТЕЛЬНО СО ВСЕМИ СЛОВАМИ НУ КАК МОЖНО БОЛЬШЕ .ПОМОГИТЕ ПОЖАЛУСТА:-)

2 года назад

Предмет: Математика, автор: russik228q

Помогите пожалуйста

9 лет назад

Предмет: Математика, автор: Alishkapro4

5/6=2x/3
5x/12=2/3
8/9=4x/27

9 лет назад