Предмет: Химия, автор: kirilbanatovic


2. Составьте цепь превращений, подтверждающая генетическую
связь между классами неорганических соединений.
ребята прошу помочь срочно!!!ставлю 5​

Ответы

Автор ответа: ilshatibragimov2005
2

Ответ: связь между классами неорганических соединений.

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7. Прочтите и переведите тексты.
The Attack on Britain's Environment
Most of the Western nations have the same basic environmental problems, but they take different forms in each country. Here you can read about some of the dangers facing Britain's environment.
Air Pollution
One of Britain's environmental successes has been the control of air pollution, especially in London. Thirty years ago hundreds of people died every year from the dreadful London smogs. Since then London and some other cities have become "smokeless zones", areas where no coal fires are allowed. But now the increase in traffic is threatening serious air pollution in our cities again.
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Решите выражение) Спасибо большое заранее 

1. 2* (-7/15 - 2/3) - 11/21 : 5/7=
2. -15-(26-54)=
3. (6/7 - 3/5) * 7/18=
4. 15-4,8:12=
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