CwetochekAnfisa
31.03.2020 06:45

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Уксусный альдегид, уксусную кислоту, этиловый спирт долгое время получали их пшеницы и сахарозы. В 1881 году русский химик - органик Кучеров М. Г. получил уксусный альдегид, минуя пищевое сырьё, из ацетилена (этина) в присутствии катализатора оксида ртути. Вычислите массу альдегида, которую можно получить реакцией Кучерова из 67,2 л ацетилена при практическом его выходе 80 %.

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Ответ:
DayanaEstDetei
08.01.2022 16:27

Дур*

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Must Waste More Time...

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Ответ:
Dinozavrik2525
23.11.2021 04:42

CIVII20II7

Объяснение:

определим валентность хлора в его соединении с кислородом — Cl2O7.

 

1. Записываем известную валентность кислорода над формулой. Неизвестную валентность обозначаем буквой x:

 

Clx2OII7.

 

2. Находим сумму единиц валентности каждого элемента. Для этого его валентность умножаем на число атомов:

 

x⋅2=2⋅7.

 

3. Вычисляем x:

 

2x=14,x=14:2=7.

 

Валентность хлора равна VII:

 

ClVII2OII7.

Составление формулы бинарного соединения по валентностям химических элементов

Если известны валентности двух элементов, то можно составить формулу их соединения.

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