Chemistry, 26.11.2020 14:00, jep88

1. Дайте характеристику серы по ее положению в Пе¬риодической системе химических элементов Д. И. Менделее¬ва по плану: а) распределение электронов по энергетическим уровням;
б) степени окисления серы в соединениях;
в) характер элемента;
г) формулы высшего оксида, гидроксида и летучего водо¬родного соединения.

2. Исключите лишнее словосочетание: моноклинная се¬ра, пластическая сера, коллоидная сера, ромбическая сера. Аргументируйте свой ответ.

3. Закончите уравнения реакций
а) S + Cu → …
б) S + O2 → …
в) S + Mg → …
Окислителем или восстановителем является сера в каж¬дой реакции?
4. Осуществите превращения по схеме:
Н2S → S → К2S → PbS
1.
2.
3.

5. Задача. Какой объем (н. у.) кислорода потребуется для сжига¬ния 6,4 г серы?

Answers: 3

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1. Дайте характеристику серы по ее положению в Пе¬риодической системе химических элементов Д. И. Мен...