Предмет: Химия, автор: Annasolovykh

Запишите значения степеней окисления и зарядов атомов в соединениях:
а)водород,вода и хлорид натрия
б)азот,аммиак и бромид магния.

Ответы

Автор ответа: koRvoQ
0
а) H (+1), H2(+1)O(-2), Na(+1)CI(-1)
б) N (-3,+3, +5), N(-3)H3(+1), Mg(+4)Br2(-2)
Автор ответа: Poliakova
0
Водород Н2 степень окисления 0
Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Английский язык, автор: LooBsteeR
Упражнение 3. Раскройте скобки, употребляя глаголы в Past Simple, Past Continuous и Past Perfect.
1. By eight o’clock yesterday I (to finish) my work and at eight I (to play) the piano.
2. By six o’clock father (to come) home and at six he (to have) dinner.
3. By nine o’clock yesterday grandmother (to wash) the dishes and at nine she (to watch) TV.
4. When I (to meet) Tom, he (to eat) an ice-cream which he (to buy) at the corner of the street.
5. When father (to come) home, we (to cook) the mushrooms which we (to gather) in the wood.
6. When I (to see) Ann, she (to look) at the flowers which she (to pick) in the field.
7. When I (to come) home yesterday, I (to see) that my little brother (to break) my pen and (to play) with its pieces.
8. When I (to open) the door of the classroom, I (to see) that the teacher already (to come) and a student (to write) a test.
9. When I (to come) home my sister (to read) a book which she (to bring) from the library.
10. When mother (to come) home, the children (to eat) the soup which she (to cook) in the morning.
11. When I (to ring) up Mike, he still (to learn) the poem which he (to begin) learning at school.
12. When I (to look) out of the window, the children (to play) with a ball which Pete (to bring) from home.
* * *
Упражнение 4. Раскройте скобки, употребляя глаголы в Past Simple, Past Continuous u Past Perfect.
Last night we (to go) to a football match. We (to take) a bus. The bus (to be) overcrowded as many people (to want) to see the match. We (to get) off the bus and (to go) in the direction of the stadium. While we (to cross) the road, I (to see) Victor. He (to stand) at the corner. He said he (to wait) for his friend who (to come) to St. Petersburg the day before and (to wish) to see the new stadium. A man (to come) up to me and asked if I (to have) a spare ticket for the match. Victor told us that two boys just (to ask) him whether he (to have) a spare ticket. We (to enter) the stadium just as the football players (to come) out on to the field. At the entrance to the stadium we (to meet) Sergei. He (to show) us to our seats and (to ask) me if I (to play) football in my childhood. We (to agree) to meet in the snack bar during the interval.
* * *
Упражнение 5. Раскройте скобки, употребляя глаголы в Past Simple, Past Continuous u Past Perfect.
1. There (to be) two men in the room. One of them (to write) something while the other (to read) a newspaper.
2. He (not to tell) me that he (to receive) a telegram from her.
3. She (to say) that he (to give) her the wrong address.
5. I (to ask) him where he (to put) my hat.
6. He (to tell) us that they (to spend) all the money.
7. 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 I (not to see) for a very long time (to enter) the room.
8. 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.
9. I (to see) him when he (to leave) the hotel.
10. He (to leave) the house before I (to have) time to ask him anything.
11. I (to find) the old man in the garden. He (to talk) to some children who (to stand) around listening to him.
12. He (to tell) me that he (to learn) it from the newspaper.
13. He (to enter) the room, (to take) something from the desk and (to go) out.
6 лет назад
Предмет: Математика, автор: vgolikov113
Вместо звёздочек поставьте пропущенные цифры​
6 лет назад
Предмет: История, автор: lomixs01
Характеристика армии Европы и России в 16 веке
6 лет назад
Предмет: История, автор: qwert2020
Укажите государства с которыми граничила Россия до 1533 года:
А)Дания
б)Саксония
В)Швеция
Г)Турция
Д)Крымское ханство
е)Польша
ж)Франция
з)Англия
9 лет назад
Предмет: Физика, автор: bars2536
Срочно помогите решить:
1)Конденсатору емкостью 10 мкФ сообщили заряд 4 мкКл. Какова энергия заряженного конденсатора?
2)Площадь
каждой из пластин плоского конденсатора 200 см², а расстояние между
ними 1 см.Какова энергия поля, если напряженность поля 500 кВ/м?
9 лет назад