Тест на тему страны азии в 19 начале 20 веков

Тест по химии (уровень: 10 класс) Тип вопросов: Открытый вопрос Количество вопросов: 1 Вывод теста с ответами: Да

Вопрос: В 1 л раствора бинарного электролита AB, диссоциирующего по схеме AB ⇌ A⁺ + B⁻, начальная концентрация AB равна C0 = 1,0×10⁻³ М. При равновесии в растворе содержится N_total частиц (молекул AB и ионов A⁺ и B⁻) = 6,041×10²⁰. Определите степень диссоциации α данного электролита.

Ответ: Пояснение:

• Общее число молекул AB в 1 л до диссоциации: n0 = C0 × V × NA = (1,0×10⁻³ моль) × (6,022×10²³ мол⁻¹) × 1 л = 6,022×10²⁰ частиц.
• При диссоциации AB ⇌ A⁺ + B⁻: если α — доля диссоциировавших формул на начальном объёме, то: n_AB = n0 (1 − α) n_A⁺ = n0 α n_B⁻ = n0 α Общее число частиц: N_total = n_AB + n_A⁺ + n_B⁻ = n0 (1 − α) + n0 α + n0 α = n0 (1 + α).
• Заданное N_total = 6,041×10²⁰. Следовательно: α = (N_total / n0) − 1 = (6,041×10²⁰ / 6,022×10²⁰) − 1 ≈ 1.00316 − 1 ≈ 0,00316.

Ответ: α ≈ 0,00316, то есть примерно 0,316%.

Ниже тест по английскому языку для 6 класса. Тема: Prepositions of time (Предлоги времени). Тип вопросов: множественный выбор. 8 вопросов. В конце — ответы.

1. I usually wake up ___ 7:00 a.m. A. at B. in C. on D. during

2. My birthday is ___ May. A. at B. in C. on D. during

3. The bus leaves ___ Friday. A. at B. in C. on D. during

4. They stayed in Paris ___ two weeks. A. at B. in C. on D. for

5. She has lived here ___ 2018. A. since B. for C. during D. in

6. The festival is scheduled ___ July 20th. A. in B. on C. at D. during

7. The baby cries ___ night. A. at B. in C. on D. during

8. The movie finished ___ two hours. A. at B. in C. on D. during

Ответы: 1A, 2B, 3C, 4D, 5A, 6B, 7A, 8B

Тест по английскому языку: Used to / Get used to / Be used to

Класс: 11

Инструкции: Выберите верный вариант ответа из предложенных.

1. I ______ play soccer every Saturday when I was a child.
   a) used to
   b) get used to
   c) am used to

2. She is now ______ waking up early for work.
   a) used to
   b) use to
   c) getting used to

3. They ______ travel to France every summer before the pandemic.
   a) used to
   b) are used to
   c) get used to

4. He is just ______ the noise from the construction site next door.
   a) used to
   b) getting used to
   c) uses to

5. We ______ eat dinner at 6 PM when the kids were younger.
   a) get used to
   b) used to
   c) are used to

6. After a few weeks, she became ______ the new schedule at work.
   a) used to
   b) use to
   c) get used to

7. I can't believe we ______ go on such long trips!
   a) are used to
   b) used to
   c) get used to

8. After living in the city, he is ______ the fast-paced lifestyle.
   a) used to
   b) get used to
   c) use to

9. He never really ______ eating spicy food until he moved to Thailand.
   a) gets used to
   b) used to
   c) is used to

10. It took her a while, but now she is ______ speaking in public.
    a) used to
    b) get used to
    c) uses to

11. My parents ______ have a garden when I was younger.
    a) get used to
    b) used to
    c) are used to

12. I am still ______ the cold weather after living in Florida for so long.
    a) get used to
    b) used to
    c) getting used to

13. They didn’t know what to expect but soon they ______ the local customs.
    a) got used to
    b) used to
    c) use to

14. He ______ wake up very early for his morning jogs.
    a) is used to
    b) used to
    c) get used to

15. It’s hard to ______ the long hours at the new job.
    a) be used to
    b) get used to
    c) used to

Удачи на тесте!