Question

Определите массовую долю углерода в молекуле Фреон R-12 ​

Answer 1

Mr (CCl2F2) = Ar (C) * N (C) + Ar (Cl) * N (Cl) + Ar (F) * N (F) = 12 * 1 + 35,5 * 2 + 19 * 2 = 121;

ω (C) = N (C) * Ar (C) * 100% / Mr (CCl2F2) = 1 * 12 * 100% / 121 = 9,92%.