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Вопрос по химии:
экспериментально осуществить цепочку превращений: сульфат меди - гидроксид меди 2 - оксид меди 2-
Автор:
zeus40
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CuSO4+2NaOH=Cu(OH)2+Na2SO4
Cu(OH)2+t=CuO+H2O
К раствору сульфата меди добавляем гидроксид натрия в результате выпадает голубой осадок.
Осадок отфильтровуем и нагреваем в результате получаем оксид меди и воду.
Еще 4 ненужных тебе вопроса, но это важно для поиска
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Вопрос по алгебре:
Запишите в виде обыкновенной дроби число 0.4(12)-
Ответов: 3
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5 лет назад
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Вопрос по английскому языку:
Ex.51.4. Откройте скобки, используя Complex Subject:
1. He (consider/ be) a good musician. 2. They (think/ go away) some days ago. 3. James (expect/ make) a report next Wednesday. 4. Steve (know/ help) them to solve a problem. 5. Mozart (know/ compose) a lot of wonderful pieces of music. 6. The film (consider/ be) the worst of the year. 7. She (suppose/ work) in the laboratory from 2 to 6 p.m. tomorrow. 8. They ( say/ make) a new discovery a month ago. 9. He is expected (manage) the business himself. 10. He ( believe/ be) at the customs office now. 11. The delegation (report/ leave) Prague tonight at ll a.m. 12. They ( know/ live) in Egypt for a long time. 13. He ( see/ work) at an urgent problem now.14. The interview with the young artist (apear/ be) interesting. 15. The prices at the hotel (turn out / be) reasonable. 16. This unpleasant man ( seem/ find) faults with me during the interview. 17.The student (prove/ know) the subject very well.-
Ответов: 2
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5 лет назад
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Вопрос по математике:
Объем первого цилиндра равен 6, его высота в два раза больше высоты второго цилиндра , а радиус второго цилиндра в 3 раза больше радиуса первого. Найти объем второго-
Ответов: 1
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5 лет назад
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Вопрос по английскому языку:
Помогите пожалуйста много баллов
Ex.51.4. Откройте скобки, используя Complex Subject:
1. He (consider/ be) a good musician. 2. They (think/ go away) some days ago. 3. James (expect/ make) a report next Wednesday. 4. Steve (know/ help) them to solve a problem. 5. Mozart (know/ compose) a lot of wonderful pieces of music. 6. The film (consider/ be) the worst of the year. 7. She (suppose/ work) in the laboratory from 2 to 6 p.m. tomorrow. 8. They ( say/ make) a new discovery a month ago. 9. He is expected (manage) the business himself. 10. He ( believe/ be) at the customs office now. 11. The delegation (report/ leave) Prague tonight at ll a.m. 12. They ( know/ live) in Egypt for a long time. 13. He ( see/ work) at an urgent problem now.14. The interview with the young artist (apear/ be) interesting. 15. The prices at the hotel (turn out / be) reasonable. 16. This unpleasant man ( seem/ find) faults with me during the interview. 17.The student (prove/ know) the subject very well. (Примерно так : He is considered to be a good musician.,They was thought to go away...)-
Ответов: 3
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5 лет назад
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