Ответы 1
-
1.Спирт получим гидратацией этилена в присутствии концентрированной серной кислоты:СН2=СН2 + Н20 -> СН3-СН2-ОН2.Уксусную кислоту – окислением спирта при помощи окислителей - KMnO4, K2Cr2O7+H2SO4, O2+катализатор.СН3-СН2-ОН→СН3-CH=O→СН3-CO-OH3.Сложные эфиры получают из кислот и спиртов этерификацией.СН3-CO-OH + СН3-СН2-ОН = СН3COOC2H5 + H2O
-
Автор:
adolfo41 - 6 лет назад
-
0
-
-
Добавить свой ответ
Еще вопросы
-
Как решить тригонометрическое уравнение (помогите, плиииз...)
sinx = cos7x ? -
Помогите пожалуйста, нужно раскрыть скобки, что бы получилось целое, плавильное письмо. Спасибо
Hi, Denis! How are you?
School exams (0) start (to start) next week - yuck! I hate exams. I always feel nervous. This year we have (1) _____(to do) GCSE. I (2) _____(to learn) 11 subjects this schools year. If I (3)_____ (to pass) the GCSE successfully, I can study for the A lever exams. A lever are necessary if a pupil (4) _____ (to want) to do university. I (5)_____ (to study) IT at University, because I (6) ______ (to be interested in) computers since my childhood.
Of course our teachers want us (7) ______(to do) our best. That's why we (8) _____ (to go through) again what we (9)_____ (to learn) before we take our final exams.
And you? Write me a letter and tell about your plans.
Your friend, Vlad.-
Предмет:
Английский язык -
Автор:
jackpoteqxr - 6 лет назад
-
Ответов:
1 -
Смотреть
-
-
Al. Choose the variant with the verb do.
1) (do / make) well 3) (do / make) a fire
2) (do / make) friends 4) (do / make) a bed
A2. Choose the appropriate words.
I knew I would have to ... my driving test as soon as I saw the....
1) retake, examiner 3) retake, examination
2) take, examine 4) give, examiner
A3. Match the words on the left and the endings on the right.
1) retire a.-able
2) individual b. -ment
3) honour c. -ity
4) dis- d. -respect
A4, Choose the correct form of the verbs.
English is an easy language to study, it... by more than 450 million people all over the world.
1) was spoken 3) is spoken
2) speaks 4) is speaking
Bl. Put the words in order to make the sentences. Write them down.
1) if / scientist / a / you / were / machine / would / a / new/you/invent
2) famous / a / programmes / would / you / in / were / if / take / you / part / TV / person
Cl. Complete the sentences.
1) If you saw a ghost, you
2) If you were asked to organize a picnic, you.-
Предмет:
Английский язык -
Автор:
molina - 6 лет назад
-
Ответов:
0 -
Смотреть
-
- Прямокутник,одна сторона якого дорівнює 2 см, а його діагональ дорівнює √7 см.
Топ пользователей
-
Fedoseewa27
35934 -
Devilian
2792 -
Pikachu
2228 -
hobbesbowers
2116 -
kaylynnbarron676
1818 -
女fei
1240 -
yulia-kaplina
1158 -
Poinntt
946 -
Bars
930 -
Queenmagic18
770
How much to ban the user?
1 hour
1 day
100 years