Предмет: Химия, автор: Deuse

Найти формулу вещества, если: W% ( C ) = 80 %, W% ( H ) = 20 %,
Плотность по водороду 15.

Ответы

Автор ответа: тайная

0

Дано:
w (C) = 80%
w (H) = 20%
D(H2) = 15
Найти: CxHy
Решение:
Mr (в-ва) = 15∙ 2 = 30
n (э) = w(э) ∙ Mr(в-ва) Ar(э) ∙ 100%
n (C) = 80% ∙ 30 12 ∙ 100% = 2
n (H) = 20% ∙ 301 ∙ 100% = 6
n (C) : n (H) = 2:6 = CxHy = С2H6
ответ: С2H6 – этан

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