Предмет: Химия, автор: Tanya5100476

Определите тип химической связи в следующих соединениях: а) аммиак NH3  б) оксид углерода(IV) СО2  в) фторид цезия СsF  г) гидрид лития  LiH д) йодид калия KI

Ответы

Автор ответа: trserg
0
 а) аммиак NH3    ковалентная полярна
б) оксид углерода(IV) СО2    ковалентная полярная
в) фторид цезия СsF    ионная
г) гидрид лития  LiH   ионная
д) йодид калия KI    ионная
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Раскройте скобки, употребляя глаголы в Past Simple, Past Continuous и Past Pertect.
1. There (to be) two men in the room. One of the (to write) something while the other (to read) a new paper.
2. He (not to tell) me that he (to receive)
a telegram from her.
3. I (to ask) him if he (to know)
where she (to live). I (to say) I (not to know) her address.
4. He (to ask) me if I (can) give him your address.
5. She (to say) that he (to give) her the wrong address.
6. I (to ask) him where he (to put) my letter.
7. He (to tell) us that they (to spend) all the money.
8. I (to sit) in an armchair and (to think) of my coming trip across the North Sea when the door suddenly (to open) and an old friend of mine whom l (not to see) for a very long time (to enter) the room.
9. She (to come) to see us just at the time when we (to have) dinner. It (to be) the first time I (to see) her.
10. I (to see) him just as he (to leave) the hotel.
11. I (not to see) him before we (to meet) at the concert.
12. He (to leave) the house before I (to have) time to ask him anything.
13. After spending several days in Paris he (to feel) lonely and (to want) to
return home.
14. I (to think) he already (to go) home.
15. I (to find) the old man in the garden. He (to talk) to some children who (to stand) around listening to him.
16. He (to speak) a language we never (to hear) before.
17. He (to tell) me he (to learn) it from the newspaper.
18. He (to enter) the room, (to take)
something from the desk and (to go) out.