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На основании молекулярной формулы С4Н6 определите, к какому классу углеводородов относится вещество. Составьте структурные формулы одного изомера и одного гомолога. Назовите все вещества.
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Предмет:
Химия -
Автор:
simone5fpq - 6 лет назад
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Ответы 1
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Автор:
sweety3awm - 6 лет назад
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22. Open the brackets and put the verb into the correct tense form (Present, Past or Future, Simple or Progressive, Active or Passive)
1. Now she … (to look for) a better job. 2.The polar ice caps … (to consist) of millions of tons of ice. 3. You … (to know) that man? Why he … (to look at) us? 4.When Don … (to arrive) we … (to have) coffee yesterday. 5. There is somebody walking behind us. I think we... (to follow). 6.Numerous questions … (to discuss) by the commission at the moment. 7.They … (to have) a party at the moment. 8.The television was on but nobody … (to watch) it. 9.Many accidents … (to cause) by bad driving. 10.He … always (to borrow) money from me. 11.I … (to walk) when it … (to start) to rain. 12.Cathy … (to phone) when her parcel (to arrive). 13.Hello, Mike, what you … (to do) in this part of the city? – I … (to look for) a new flat to rent. 14.I waved to her but she … (not to look). 15.Sam … (to fall) down the stairs this morning and … (to hurt) his leg. 16.Mum, what you …
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