При реакции алкена с избытком хлора в темноте образуется 42,3 г. дихлорида,а в такой же реакции с избытком бромной воды - 69 г. дибромида. Установите формулу алкена.

При реакции алкена с избытком хлора в темноте образуется 42,3 г. дихлорида,а в такой же реакции с избытком бромной воды - 69 г. дибромида. Установите формулу алкена.
- Предмет:
  Химия
- Автор:
  morales
- 5 лет назад

Ответы 1

CnH2n+Cl2=CnH2nCl2CnH2n+Br2=CnH2nBr2Для 1 моль алкена разница в массе составит:160-71=89г.Пусть у нас "Х" моль алкена,тогда разница в массе составит: 69-42,3=26,7гn(CnH2n)=26,7:89=0,3моль;M(CnH2nBr2)=69:0,3=230г/моль;12n+2n+160=23014n=70n=5Ответ:C5H10.
- Автор:
  skipperocng
- 1 год назад
- 5
Добавить свой ответ

Еще вопросы

как разобрать предложения утром стрижи летают высоко над землёй(полный
синтостический разбор
- Предмет:
  Русский язык
- Автор:
  alonsogcmd
- 5 лет назад
- Ответов:
  
  1
- Смотреть
загадка it doesn t have legs, but it goes
- Предмет:
  Английский язык
- Автор:
  kayden353
- 5 лет назад
- Ответов:
  
  1
- Смотреть
(284.346-89.624:8-192.415):4-19.903
- Предмет:
  Математика
- Автор:
  tiara
- 5 лет назад
- Ответов:
  
  1
- Смотреть
помогите плииз

1. The opposite meaning of the
word expensive.

A)    long

B)
good

C)
cheap

D)
useful

E)     beautiful

2. A person who cuts your hair.

A)    Nurse

B)
Doctor

C)
Teacher

D)
President

E)     Hairdresser

3. Choose the correct preposition.

Students are looking …the board.

A)
at

B)
by

C)
in

D)
for

E)
after

4.
Choose the correct modal verb.

The
music teacher … play the piano very well. She plays every class.

A)
can

B)    could

C)    have to

D)    going to

E)
will
be able to

5. Choose the plural form of the noun foot.

A)    feet

B)
feets

C)
foots

D)
feetes

E)     footes

6. Choose the correct form of the verb to be.

Ladies and Gentlemen, here …the news.

A)    is

B)
am

C)
are

D)
were

E)     been

7. Choose the correct form of the verb.

I … my
best friend for ten years.

A)    know

B)    knowed

C)    knowing

D)    has known

E)     have known

8. Choose the correct
adverb.

You haven’t got much
experience. You should drive….

A)    careful

B)    carefully

C)    very careful

D)    most carefully

E)     the most careful

9. Choose the correct adjective.

She is very … . She always tells the truth.

A)
honest

B)
strange

C)
small

D)
educated

E)
sensitive

10. Choose the
correct form of the verb.

He ______ his
car a month ago.

A)    buy

B)
buys

C)
bought

D)
buying

E)     was bought

11. Choose the correct answer.

__________ left first? Peter.

A)    Who

B)
What

C)
Where

D)
Which

E)     Whom

12. Choose the correct form of the verb.

We couldn’t play tennis because it … raining.

A)    is

B)
am

C)
are

D)
was

E)     were

13. Word order. Make up a sentence.

watching/like/ I/TV/and/ friends/my

A)    My friends and I like watching TV.

B)
Watching TV I
and my friends like.

C)
I like watching
TV my and friends.

D)
Like watching TV
I and my friends.

E)     Friends and I like my watching TV.

14. Fill the gap with one suitable word.

Michael Smith gets up at (14)…past eight every Sunday
morning and has (15)…with his family.

A)    to

B)
half

C)
after

D)
when

E)
before

15. Fill the gap with one suitable word.

Michael Smith gets up at (14)…past eight every Sunday
morning and has (15)…with his family.

A)    go

B)
toys

C)
book

D)
breakfast

E)     newspaper
- Предмет:
  Английский язык
- Автор:
  macaljd
- 5 лет назад
- Ответов:
  
  0
- Смотреть

При реакции алкена с избытком хлора в темноте образуется 42,3 г. дихлорида,а в такой же реакции с избытком бромной воды - 69 г. дибромида. Установите формулу алкена.

Ответы 1

Топ пользователей