Предмет: Химия, автор: klocanovdima

Визначте речовини X та Y y схемі перетворень СаС2 → X → Y → C2H6. Складіть рівняння хімічних реакцій, відповідні даній схемі. Дайте назву речовинам, що беруть участь у перетвореннях

Ответы

Автор ответа: тайная

1

Ответ:

CaC₂ + 2H₂O = Ca(OH)₂ + C₂H₂

кальцій карбід, вода, кальцій гідроксид, етин

C₂H₂ + H₂ --> C₂H₄ (Kt=Ni,t)

етин, водень, етен

C₂H₄ + H₂ --> C₂H₆ (Kt=Ni,t)

етен, водень, етан

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I Mark the sentences True (+) or False (-)
1. There is a lot of information in our world.
2. There are many people who want to share this information.
3. Mass media is the way how people share this information.
4. The greatest source of mass media is internet.
5. There are hundreds of sites where people can find useful information.
6. We use Internet for information.
7. We can find friends online.
8. I think that this is really a dangerous thing that people created.
9. It is safe online.
10.Viruses can damage your computer.
11. Television is not popular nowadays.
12.The first movie was made by Lumiere brothers in 1898.
II Match the sentences
1. After the World War II
television …
2. I think, you won't find people ..
3. You will find TV sets …
4. Television is a source of
information …
5. People watch TV to find …
6. Many things are …
7. You may watch the news …
8. Using a satellite aerial you
can join …
9. You can learn foreign
languages, because …
10. You can find everything …
11. There are special channels for
children …
12. As it was counted an average
person watches …
13. Newspapers are rather …
a) almost in every house.
b) became very popular.
c) the answers or just to relax.
d) or a good film.
e) the channels are in different
languages.
f) you want.
g) and adult, music and news
channels.
h) who don't know what TV is.
i) spread in Ukraine too.
j) of newspapers and
magazines.
k) using our mobile phone.
l) and entertainment.
m) broadcasted on TV.
n) a lot of channels.
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