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Вопрос по химии:
Решите цикл превращений, в цикле под формулами подпишите название веществ, при решении укажите тип реакций
C4H10 - - - - - C4H8 - - - - - C4H8Br2-----C4H6-
Автор:
khalil
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Дополню своей ответ. C4H10 - н-бутан, C4H8 - бутен-2 и бутен-1, C4H8Br2 - 2,3-дибромбутан или 1,2-дибромбутан. C4H6 - бутин-2 или бутин-1
Решение в приложенном фото. Дополню свой ответ. C4H10 - н-бутан, C4H8 - бутен-2 или бутен-1, C4H8Br2 - 2,3-дибромбутан или 1,2-дибромбутан. C4H6 - бутин-2 или бутин-1
Еще 4 ненужных тебе вопроса, но это важно для поиска
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Вопрос по физике:
Однородные сплошные шар и обруч двигаясь с одинаковой скоростью по горизонтальной плоскости вкатываются вверх по наклонной плоскости. Найти соотношение высот подъёма этих тел.
Срочно с пояснением , пожалуйста)-
Ответов: 1
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6 лет назад
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Вопрос по математике:
В студенческой группе английский язык изучают 19 студентов, немецкий язык - 17 студентов, французский язык - студентов, английский или немецкий - 28 студентов, английский или французский - 28 студентов, немецкий или французский - 24 студента. Только один язык изучают 19 студентов. Сколько студентов изучают хотя бы два иностранных языка?-
Ответов: 1
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6 лет назад
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Вопрос по английскому языку:
Put the verbs in brackets into the Present Simple or Future Simple Tense.
1) If you ... (to come) to see me tomorrow, I ... (to be) very glad.
2) We ... (to visit) the Tower of London when we ... (to go) on
a tour next summer. 3) She ... (to prepare) dinner as soon as
she ... (to finish) cleaning the flat. 4) If you ... (to do) your
homework properly, you ... (not to get) a bad mark. 5) The baby
... (not to fall asleep) if you ...• (to make) so much noise. 6) Frank
... (to have) a stomachache if he ... (not to eat) so much. 7) My
parents ... (to be) angry if I ... (to fail) the exam. 8) Pam always
... (to talk) to her mother when she ... (to need) a piece of advice.
9) I usually ... (to go) to bed early when I ... (to be) tired. 10) If
Tony ... (to manage) to buy the tickets, we ... (to go) to the
concert tonight.-
Ответов: 1
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6 лет назад
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Вопрос по английскому языку:
Можно пересказ даю 25 баллов
Dmitry Shparo is a famous Russian explorer. He has walked across the Arctic, the North Pole and many other extreme places of the planet. Some of his expeditions have been added to the Guinness Book of World Records.
The famous traveller was born in Moscow, in 1941. In 1956, he entered Moscow State University. Dmitry Shparo wanted to be a mathematician like his mother. While he was a student, he started hiking and cross-country skiing. Dmitry spent all his vacations doing all sorts of adventure hikes. He was especially fond of long and difficult trips in the Far North.
In 1970, Dmitry Shparo, together with his four friends, went on a hike along the Taimyr Peninsula in the north of Russia. They took a lot of pictures on the long, hard trip. Later, their photos were published in the central newspaper. During a meeting with the journalists, the five travellers said: “We shall go to the North Pole!” However, it took them nine years to make their dream come true.
In March 1979, Dmitry Shparo and his team started the expedition to the North Pole. It was a challenging mission. They had to cope with the extreme cold and with the drifting ice that formed huge mountains in their way. In spite of the hardships, it took the brave travellers only two months to get to the North Pole.
Several years later, Dmitry Shparo decided to cross the Arctic to the North Pole. He planned to do it during the Arctic night, in total darkness. It was a dangerous and very hard expedition. The travellers had to cope with drifting, crashing ice and extremely cold temperatures. In spite of all these difficulties, in February 1986, Dmitry Shparo and his team reached the North Pole. The “Arctic Night” journey appears in the Guinness Book of World Records.
In 1989, Dmitry Shparo and his American colleague, Paul Shurke, crossed the Bering Strait that separates Eurasia from America, on dog sleds. Later, in 1998, Shparo and his son, Matvey, were the first Europeans to ski across the Bering Strait, from Russia to North America. That same year, Dmitry Shparo initiated another of his life’s projects. With the help of Canadian Paralympic athlete Rick Hansen he founded the Adventure Club to encourage disabled people to travel. Over the past 20 years the Adventure Club has arranged a lot of different events for disabled athletes and disadvantaged children all around the world. Under Shparo’s personal patronage, blind and deaf people and amputees have reached mountain peaks and crossed deserts, including the frozen ones.
Shparo’s sons, Matvey and Nikita, take an active role in the work of the club. In recent years, the Adventure Club has focused on youth programmes — for example, several youth ecological camps called Great Adventure were organized in Karelia. The club also arranges trips to the North Pole for children.
Dmitry Shparo has published several books about his journeys. The most famous books are: A Way to the North, To the Pole! and Three Mysteries of the Arctic.-
Ответов: 1
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6 лет назад
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