Дано 0.5 моль углерода. Вычислите массу углерода. - №22073381

Дано 0.5 моль углерода. Вычислите массу углерода.
- Предмет:
  Химия
- Автор:
  cayetanog2ur
- 6 лет назад

Ответы 2

масса углерода по-моему половина
- Автор:
  sweetie-pie
- 6 лет назад
- 0
Дано: n=0,5;M=Mr=C*2=12*2=24Найти: m-?Решение: m=n*M→24*0,5=12Ответ:12
- Автор:
  mooney
- 6 лет назад
- 0
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I.Match the words (and phrases) which have opposite meanings.
1. Prohibit
2. protect
3. pollute
4. throw
5. drop litter
6. be in danger
7.avoid doing something
a) damage
b) clear rubbish away
c) be out of danger
d) allow
e) enjoy doing something clean
d)catch
II.Complete each sentence with one of the words or phrases below.
polution, rubbish, cans, environment, packaging, protect, is thrown, in danger,pro hibited, pollute, bins, clearing up.
People get a lot of food from the sea. But we have made the sea a very dirty place. If we are not carefulul, ... will kill many of the animals and plants in the sea. A lot of rubbish ... into the sea. Sea animals,fish and birds are .... Some animals try to eat the., they die. Oil from big ships, chemicals and waste... the sea and kill whales and dolphins,fish and sea birds. Luckily many people realize now that we must look after the sea and ... it. They say polluting the sea should be strictly ,.. . Groups of people who care about the ... spend their free time ...litter from the beaches. People collect..., bottles and… and put them into different... for further recycling.
III.Use the word in capitals to form a word that fits suitably in the bank space.
1. POLLUTE
... is one of the most serious and crucial world's problems of our day.
2. PROTECT
The young woman didn't know where to look for... .
3. ENVIRONMENT
Some of the first... organizations in the world started in Britain.
4. DANGER
It was a very ... journey.
5. USE
When the young people first came to Ireland, they weren't ... to cold weather.
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Smoking is strictly ... in the office.
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