Предмет: Химия, автор: sofia2019fgjnfeyi56i

Пожалуйста помогите химия 7 класс , очередь надоо . 24 балла . 10 номер

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Автор ответа: zberovskayap43s1j

Понятие 8% раствор означает, что в 100 г раствора содержится 8 г растворенного вещества, поэтому можем составить пропорцию:

100 г р-ра -------------- 8 г в-ва

240 г р-ра -------------- Х г в-ва

Х = 240*8/100 = 19,2 г соли

Тогда воды нужно:

240 - 19,2 = 220,8 г воды

так как плотность воды равна 1 г/мл, то 220,8 г воды имеют объем 220,8 мл

Ответ: 19,2 г соли и 220,8 г воды

sofia2019fgjnfeyi56i: А по формулам? Спасибо

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