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Химики,пожалуйста,помогите!Какой объем аммиака нужно израсходовать ,чтобы синтезировать 200г нитрата аммония(н.у), если его выход состовляет 64%?
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Предмет:
Химия -
Автор:
jerrycohen - 5 лет назад
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Ответы 1
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NH3 + HNO3 = NH4NO3n(NH4NO3) = 200/80 = 2,5 мольV(NH3) = 2,5*22,4 = 56 лV(NH3)пр = 56*100/64 = 87,5 л
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Автор:
tiffany7ca0 - 5 лет назад
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The story of Robinson Crusoe
(1) Robinson Crusoe, a young man, lives in England. He is eighteen years old. His father wants him to study at university, but Robinson dreams of the sea. he runs away from home and his adventures begin.
(2) One of his sea voyages ends with a shipwreck. Robinson finds himself alone on a desert island,
(3) Robinson lives on the island for twenty-eight years. During these years, he builds himself a house, learns how to fish and to grow plants. He also learns how to cook. At first he feels sad, but then he starts to think that he lives a much better life than he did in Europe.
(4) He does not see ane people for 15 years. Then, one day, he sees a footprint, and later saves a young man. Crusoe names him Friday, because he found him on that day of the week. Friday is extremely frategul and becomes Robinson's servant. He learns some English.
(5) For some years the two live happily. Then, a ship comes to the island. The ship is under pirates control. Crusoe saves the captain of the ship and his men from the pirates and they take him back to England.
(6) There Robinson finds that in his absence he has become a wealthy man. Crusoe gets married and his there children. Later, he visits his old island.
In pairs, answer the questions
1.- Why does Robinson Crusoe run away from home?
2.- How does one of his sea voyages end?
3.- Where does he find himself after a shipwreck?
4.- How long does Robinson stay on the island?
5.- What does he do there?
6.- How long does he live alone?
7.- Whom does he save?
8.- What name does he give him and why?
9.- Does Robinson get back to England?
10.- How does he get back to England?
11.- What does the book end with?-
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Английский язык -
Автор:
marco234 - 5 лет назад
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- вычислите массу метилацетата полученного из 64 г карбида кальция если выход эфира составляет 80%
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