Какое количество вещества содержится в навесе сульфата кальция массой 34 грамма
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15.12.2020 12:24
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Объяснение:
Дано
m(CaSO4) = 34 г
М(CaSO4) = 136 г/моль
Найти
n(CaSO4) = m / M = 34 / 136 = 0,25 моль