Используя данные таблицы, вычислите массовую долю X в соединении X₂Y₃.
Элемент | Число протонов | Число нейтронов
X | a | 2a
Y | a | 3a

  1. 1/3
  2. 1/4
  3. 1/5
  4. 1/2

📝 Detailed explanation

Ar(X)=3a, Ar(Y)=4a. M(X₂Y₃)=6a+12a=18a. ω(X)=6a/18a=1/3.
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