Предмет: Химия, автор: Vladoslatinos

Допоможіть будь ласка хімія 7 клас

Приложения:

WhiteCatt: Можете перевести на русский?

Vladoslatinos: Рассчитать массовые части элементов в соединении Кальция с Бромом.

Ответы

Автор ответа: WhiteCatt

1

формула: СаBr2

w(Br)=160\200=0,8×100%=80%

w(Ca)=40\200=0,2×100%=20%

WhiteCatt: "/"- это знак деления

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