Вопрос школьника по предмету Химия
Найдите массовую долю раствора полученного при растворении 100 г поваренной соли NaCi в 400г воды.
Ответ учителя по предмету Химия
m(NaCl) = 100.
m(H2O) = 400.
100+400=500 г.
100 = 20% от 500.
Ответ: 20%.
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