Предмет: Математика, автор: tenvoin00

Термохимическое уравнение горения бутадиена 1,3 записывается в виде 2c4h6+11o2-8co2+h2o+4620кДж,определить кол-во теплоты при сжигании 270 гр бутодиена 1,3.

Ответы

Автор ответа: sheygets20

0

Ответ:

Так тут легче просто го 48

Предыдущий вопрос

Следующий вопрос

Интересные вопросы

Предмет: Русский язык, автор: Verjatin

найдите подлежащее и сказуемое
Прощай, браток, счастливо тебе!
И тебе счастливо добраться до Кошар.
Эй, сынок, пойдем.

2 года назад

Предмет: Русский язык, автор: ramin4ik04

помогите пожалуйста! 5 класс русский язык вот фото 19,20

2 года назад

Предмет: Английский язык, автор: sean100

1. … wanted to go to the restaurant, so all stayed to have dinner at home.
A. Nothing B. Nobody C. Everybody
2. The dinner smelled … good.
A. - ; B. of C. to
3. His father calmed him … .
A. away B. down C. off
4. All Jim … that day was a sandwich.
A. eats B. ad eaten C. eated
5. “What do you think … your new painting?” – asked Bob.
A. of B. at C. by
6. “Oh, it is extremely expensive and beautiful”, … Jim.
A. said B. told C. spoke
7. After dinner he wanted … the painting but found nothing in the hall.
A. to have look at B. to have a look at C. to have a look on
8. We didn’t believe him at first, but … he said was quite true.
A. what B. which C. that
9. Every year John ___ a lot with his parents during summer vacations.
A.travelled B.was travelling C.has traveled
10. This year he ___ to visit an old castle on the seaside.
A. is going B. was going C. were going
11. The castle ___ one thousand years old.
A. is B. was C. are
12. John ___ the newspaper when the telephone rang.
A. was reading B. read C. had been reading
13. He answered ___ the phone.
A. to B. - C. on
14. “Listen ___ me, John,”- said a voice.
A. at B. for C. to
15. “I want ___ you something.
A. tell to B. tell with C. to tell
16. “When you arrive to the castle, be aware that you ___ in danger”
A. are B. is C. will be
17. John looked ___ the room.
A. at B. for C. maround
18. There was a frightened expression ___ his face.
A. in B. over C. on
19. Suddenly he noticed ___ envelope on the table.
A. an B. the C. a
20. When John ___ the letter, he began to scream.
A. finished to read B. finishes reading C. finished reading
21. He was overwhelmed ___ terror.
A. by B. at C. with
22. He heard somebody ___ the stairs, John asked “Who is there?”
A. comes up B. did come up C. coming up
23. And his ___ voice answered: “Honey! It’s time to get up!”
A. mothers B. mothers’ C. mother’s
24. “It’s 10 o’clock in ___ morning already.”
A. - B. a C. the
25. John ___ that it was just a dream.
A. understood B. realizes C. realized

2 года назад

Предмет: Русский язык, автор: lain5

Помогитеее пжжж на два вопрос отвечать с зеленый точкой

8 лет назад

Предмет: Математика, автор: Nastya151312

600 секунд Это-?
........

8 лет назад