Предмет: Химия, автор: kamenkovaanastasia95

Масові частки елементів у органічній речовині наступні: Карбон - 17,82%, Гідроген - 3%, а також міститься Бром. Відносна густина пари речовини за воднем 101.
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Ответы

Автор ответа: dyexfnf
1

Ответ:

Объяснение:

Дано:

ω(Н) = 3% або 0,03

ω(C) = 17,82% або 0,1782

ω(Cl) = 62,8% або 0,628

D(Н2) = 101

Знайти: CxHyBrz - ?

М(CxHyBrz) = D(H2) * M(H2) = 101 * 2 = 202 г/моль

ω(Br) = 100% - 17,82% - 3% = 79,18% або 0,7918

Знайдемо кількість речовини Карбону , Гідрогену і Брому:

n(C) = ω(C) * М(CxHyBrz)/М(С) = 0,1782 * 202/ 12 = 3 моль

n(H) = ω(Н) * М(CxHyBrz)/М(Н) = 0,03* 202/ 1 = 6 моль

n(Br) = ω(Br) * М(CxHyBrz)/М(Br) = 0,7918 * 202/ 80 = 2 моль

n(C) : n(H) : n(Br) = 3 : 6 : 2

Молекулярна формула речовини : С3Н6Br2

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