Предмет: Химия, автор: osheravashka

. Виведіть молекулярну формулу вуглеводню, масова частка Гідрогену якому становить 20%, а відносна молекулярна маса - 30.​

Ответы

Автор ответа: dyexfnf
1

Ответ:

Объяснение:

Дано:  

w(H) = 20% або 0,2

Mr = 30

Найти CxHy -?

Масова частка Карбону в сполукі:

w(C) = 100% - w(H)= 100% - 20% = 80% або 0,8

Знайдемо кількість речовини:

n(C) = w(C) * M(CxHy)/M(C) = 0,8 * 30/12 = 2 моль

n(H) = w(Н) *M(CxHy)/M(H) = 0,2 * 30/1 = 6 моль

n(C) : n(H) = 2 : 6

Формула вуглеводню: С2Н6

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