Предмет: Химия, автор: e3809502

1.Визначте число атомів Оксигену і Карбону, що містяться у 2 молях вуглекислого газу.
2. Обчисліть кількість речовини сульфатної кислоти H2SO4 у зразку, що містить 3,01 · 1023 молекул. Визначте кількість атомів Сульфуру та Оксигену.
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Ответы

Автор ответа: korniychukruslan1981
0

Відповідь:

Число атомів Оксигену і Карбону у 2 молях вуглекислого газу:

Вуглекислий газ (CO₂) складається з одного атома вуглецю © та двох атомів кисню (O). Отже, у 2 молях CO₂ міститься:

Атомів вуглецю ©: 2 молі * 6.02 × 10²³ атомів/моль = 1.2044 × 10²⁴ атомів вуглецю.

Атомів кисню (O): 2 молі * 6.02 × 10²³ атомів/моль * 2 атоми/молекула = 2.4048 × 10²⁴ атомів кисню.

Усього в 2 молях вуглекислого газу міститься 3.6092 × 10²⁴ атомів.

Кількість речовини сульфатної кислоти (H₂SO₄):

Давайте спершу знайдемо масу однієї молекули сульфатної кислоти:

Маса водню (H): 2 атоми * атомна маса водню = 2 * 1.00794 г/моль

Маса сірки (S): 1 атом * атомна маса сірки = 32.065 г/моль

Маса кисню (O): 4 атоми * атомна маса кисню = 4 * 15.9994 г/моль

Загальна маса H₂SO₄ = маса водню + маса сірки + маса кисню.

Тепер обчислимо кількість речовини H₂SO₄:

3,01 × 10²³ молекул * 1 моль H₂SO₄ / 6.02 × 10²³ молекул = 0.5 моль H₂SO₄.

У зразку міститься 0.5 моль сульфатної кислоти.

Кількість атомів Сульфуру та Оксигену:

Атомів сірки (S): 0.5 моль * 1 атом сірки = 0.5 атома сірки.

Атомів кисню (O): 0.5 моль * 4 атоми кисню = 2 атоми кисню.

Таким чином, у зразку міститься 0.5 атома сірки та 2 атоми кисню.

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