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Вычислите молярную концентрацию 20%-ного раствора серной кислоты, если плотность раствора равна 1,1г/мл.
Помогите, пожалуйста, очень надо!-
Предмет:
Химия -
Автор:
pascualhskt - 6 лет назад
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Ответы 2
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Вы уверены?)
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Автор:
daniellecjrn - 6 лет назад
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0
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да на молярную концентрацию есть формула. нахожление через плотность % молярная масса
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Автор:
martha - 6 лет назад
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Kellie looked for Sebastian's mum at home, but she was not there. Kellie thought about it and went to the cafe. She saw a lot of people there. One of them was a police officer. Mrs Clifford and Mum were sitting and talking with the police officer.
"Kellie!" - Mum came over to the dog.
"Where is Sebastian?" Kellie gave Mum the note and she read it aloud. "The robber is at 10, Sainsbury Street. Get the police!"
"What a brave boy, and what a smart dog you are!" said the polise officer. "Go straight to the police car. Hurry up!"
Sebastian was standing behind a tree waiting for Kellie. He knew Kellie and Mum would be back soon. But he couldn't see the robber anymore. Suddenly the door opened and the robber came out house. He was going to get into his car. Sebastian wished he still had Kellie with him. The robber looked around. He saw the boy hiding behing the tree! "Hay, kid! I saw you earlier. Come here!" Sebastian was in danger now. He was ready to take off. The robber was coming at him...
"Stop where you are!" The police car arrived just in time. The robber stopped. Then Sebastian heard his dog barking. Kellie and Mum were running toward him. Thay were so happy to see him. The police officers made the robber get into the polise car.
"Sebastan! Next time you decide to go catch a robber, please tell me first!" said Mum
нужно найти глаголы-
Предмет:
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Автор:
poole - 6 лет назад
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Ответов:
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- [tex] \frac{cos18*cos28+cos108*sin208 }{sin18*sin78+sin108*sin168} [/tex]
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