Предмет: Химия, автор: mrstae596

Вкажіть букву, під якою наведено формули оксидів:
А) H2O, Li2O,NaOH;
Б) Na2O,NaCl,Cl2O7;
В) CO2,CO,CuO;
Г)NH3,CO,K2O.​

Ответы

Автор ответа: chemistrycrush
2

В

СО2- кислотный оксид(углекислый газ)

СО- оксид углерода (2)

СuО- оксид меди (2)

Автор ответа: Falik13
4
Правильный ответ: В, ибо оксиды- бинарные соединения, в состав которых входит кислород
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ПОМОГИТЕ УМОЛЯЮ!!!!!!!!!!
1.There is … water in the pond.


a) little


b) few


c) many


2.Are there …cinemas in the town?


a) much


b) a lot of


c) many


3. She can’t understand anything at the lessons because she never…her teacher.


a) listens to


b) hears


c) listens


4. Who …Moscow?


a) found


b) founded


c) find


5. Trafalgar Square is a place…with tourists.


a) geographical


b) popular


c) admiral


6. The British Parliament is the…in the world.


a) best


b) oldest


c) largest


7. The house stood on the high …of the river.


a) shore


b) shore/ bank (оба варианта верны)


c) bank


8. During their journey they visited some …countries.


a) European


b) Europe


c) Europe’s


9. It is very hot today. It is twenty- five degrees…zero.


a) below


b) above


c) after


10. The hotel looked…, so we decided not to stay there.


a) scruffy


b) neatly


c) well


Grammar Test


Choose the correct variant:


1. We didn’t meet…in the street.


a) nobody


b) anybody


c) somebody


2. My family … St Petersburg last September.


a) is visiting


b) was visiting


c) visited


3. Only …people live in this place.


a) two thousand


b) two thousands


c) two thousand of


4. There are …rivers in the country.


a) hundreds


b) hundreds of


c) the hundreds


5. My friends visited Scotland and Northern Ireland …


a) as well


b) either


c) also


6. I don’t know …book it is, but it is not mine.


a) who


b) whom


c) whose


7. Do you know the holiday…people celebrate in February?


a) who


b) which


c) whom


8. Where …the money? …on the table.


a) is…? It is…


b) are…?They are…


c) ---- (ничего не ставится)


9. If it …tomorrow, the children… to the zoo.


a) will rain…will not go


b) rains…don’t go


c) rains…will not go


10. Your clothes…always nice. Who buys…for you?


a) is…it


b) are…them


c) are…i