Предмет: Химия, автор: sashayagotin1

Маса хлору Сl2 14,2г. Знайти кількість речовини, об'єм, число молекул та число атомів.

Ответы

Автор ответа: karpenkopasha19
1

Відповідь:

Маса одного моля хлору Сl2 становить 71 г. Отже, кількість речовини хлору в 14,2 г дорівнює:

n = m / M = 14,2 г / 71 г/моль = 0,2 моль

Молярний об'єм хлору Сl2 становить 22,4 л/моль. Отже, об'єм 14,2 г хлору дорівнює:

V = n * Vm = 0,2 моль * 22,4 л/моль = 4,48 л

В одній молекулі хлору Сl2 міститься два атоми. Отже, у 14,2 г хлору міститься:

N = n * NA = 0,2 моль * 6,02 * 10^23 моль^-1 = 1,2 * 10^23

Таким чином, кількість речовини хлору в 14,2 г дорівнює 0,2 моль, об'єм - 4,48 л, число молекул - 1,2 * 10^23, число атомів - 2,4 * 10^23.

Відповідь:

Кількість речовини: 0,2 моль

Об'єм: 4,48 л

Число молекул: 1,2 * 10^23

Число атомів: 2,4 * 10^23

Пояснення:


sashayagotin1: пасиба
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