Предмет: Химия, автор: Feeteeerty

какая масса и количество вещества содержится в 17,28•1023 молекул воды H2O

Ответы

Автор ответа: svetka1574

Ответ:

Объяснение:

Дано

N(H2O) = 17,28 *10²³ молекул

Na = 6*10²³ 1/ молекул

М(H2O) = 18 г/моль

Найти

n(H2O)

m(H2O)

n(H2O) = N(H2O) / Na = 17,28 *10²³ / 6*10²³ = 2,88 моль

m(H2O) = n * M = 2,88 * 18 = 51,84 г

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