Предмет: Химия, автор: supergames368

При сгорании 4,95 г органического вещества в качестве единственных продуктов сгорания образовались углекислый газ массой 14,3 г и вода массой 2,25 г.
Известно,что при гидролизе данного соединения в щелочной среде образуются две соли.
1 проведите необходимые вычисления и установите молекулярную формулу исходного органического вещества
2 составьте структурную формулу этого вещества ,которая однозначно отражает порядок связи атомов в его молекуле
3 напишите уравнение гидролиза вещества в присутствии соляной кислоты.​

Ответы

Автор ответа: MasterJedi
2

Ответ:

n(CO2) = m/M= 14,3/44= 0,325 моль

Откуда n(C)= n(CO2)= 0.325 моль

m(C) = 12г/моль * 0,325 моль = 3,9 г

n(H2O) = m/M = 2,25г/18 г/моль = 0.125 моль

n(H)= 2n(H2O) = 0.125 моль * 2 = 0,25 моль

m(H) = 0.25моль * 1г/моль 0,25 г

В данном соединение присутствует кислород, поэтому m (O) = m (в-ва) - m(C) - m(H) =0,8 г

Количество вещества кислорода

n(O)= 0.8г/16 г/моль = 0,05 моль

n(C):n(H):n(O) = 0.325: 0,25 : 0,05 = 6,5: 5 : 1 = 13: 10: 2

С13 H10 O2 -истинная формула данного соединения

Исходным веществом является фенилбензоат

И реакция гидролиза фенилбензоата:

Объяснение:

Приложения:

supergames368: Спасибо вам большое!!!
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1. Is the skeleton is composed of bones?

2 How many bones are there in the skeleton of an adult person?

3 what parts does the skull consist of?

4  what parts does spine  consist of?

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7    Do all bones consist  of organic and  inorganic substances?

 

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        The skeleton is composed of bones. In the adult the skeleton has over 200 bones.

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         The chest (thorax) is composed of 12 thoracic vertebrae, the breastbone and 12 pairs of ribs. The breastbone is the long bone in the middle of the chest. It is composed of three main parts. The basic part of the chest is formed by the ribs. On each side of the chest seven ribs are connected with the breastbone by cartilages. The cartilages of three other ribs are connected with each other and with the seventh rib. But the cartilages of these ribs are not connected with  the breastbone. The eleventh and the twelfth ribs are not connected with the breastbone either. They are not connected with other ribs, they are free. Each rib is composed of a head, neck and body.

          The lower extremity consists of the thigh, leg and foot. It is connected with the trunk by the pelvis. The upper extremity is formed by the arm, forearm and hand. It is connected with the trunk by the shoulder girdle.

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