Предмет: Химия, автор: jornojovano38

4. Рассчитайте молярную концентрацию гидроксида натрия в водном растворе, если В ДВУХ ЛИТрах его содержится 46,0 г вещества.
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Ответы

Автор ответа: dyexfnf
1

Ответ:

Объяснение:

Дано:

V = 2 л

m(NaOH) = 46 г

Найти: Cm(NaOH) - ?

Молярная масса NaOH равна:

М(NaOH) = 23 + 16 + 1 = 40 г/моль

Рассчитаем молярную концентрацию гидроксида натрия:

Cm(NaOH) = m(NaOH)/(М(NaOH) * V) = 46/(40 * 2) = 0,575 моль/л

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