Предмет: Химия, автор: karnaval283

определите и подпишите над знаками элементов их валентность

Приложения:

Ответы

Автор ответа: saxarykn

0

NA(I)S(II)

HBr(I)

SO3(II)

Fe(III)O(II)

HNO2(I)

K(I)Cl(I)O(II)

Li(I)PO4(III)

Предыдущий вопрос

Следующий вопрос

Интересные вопросы

Предмет: Математика, автор: yarovenkon2014

сколько будет 68/75:30/34 очень надо

2 года назад

Предмет: Английский язык, автор: baghinyan1999

Ex. Use the Past Continuous or the Past Perfect Continuous instead of the Infinitives in brackets.
1. She had a sore throat because she (to sing) since morning.
2. He (to read) his evening paper as usual when a friend of his called him on the telephone.
3. He (to read) before the fire for half an hour when the telephone rang.
4. When we went to see them last night they (to play) chess; they said they (to play) since 6 o’clock.
5. The boys (to play ) football and didn’t hear their mother calling them from the window.
6. The boys were tired because they (to play) football for an hour.
7. He (to look) at the fire and (to think) or something.
8. He (to look) 3 or 5 minutes at the fire and then turned his face to me; it was sad.
9. At last I found the book which I (to look far) all day.
10. He asked me what I (to look for).
11. When I entered the room sir George (to talk) in a loud voice.
12. They told me sir George just (to talk) about me.
13. She put aside the book she (to read) since morning and rose from her seat.
14. We (to work) in silence for some time when john spoke.
15. Robert was awfully tired as he (to work ) all afternoon.

2 года назад

Предмет: Русский язык, автор: Harukо

Какая ошибка допущена в объявлении, текст которого цитируется героями книги Олеся Гончара «Собор»? - Думаю, Верунька, размышляю, не записаться ли мне в секцию классовой борьбы?
- Это что-то новое.
- Именно такое объявление висит у нас в деканате…
- Грамотеи, - Верунька тихо смеется.

2 года назад

Предмет: Математика, автор: ПавловВлад

помогите заполнить таблицу

8 лет назад

Предмет: Физика, автор: ilshan2013

на поверхность большого водоема попала капля масла может ли масляная пленка покрыть весь водоем

8 лет назад