1)Какие из ионов, соединяясь между собой, образуют малодиссоцирующие соединения: K+, Na+, Cu2+, NO3–, NH4+, SO42-, OH-? 

2)В какую сторону сместится равновесие любого электролита, если к раствору сероводородной кислоты добавить: а) Na2SO4; б) NaOH; в) H2SO4. 3)Напишите молекулярно-ионные формы уравнений гидролиза солей FeCl3, CH3COONа и укажите реакцию их водных растворов.

Что значил Кавказ для Лермонтова-офицера, Лермонтова- человека, Лермонтова- поэта?

Переведите и поставьте предложение в  active Voice

1 He was exhausted by his hard work

2 My pen was taken by somebody

3 He said his wallet had been stolen by someone

4 Their steps were heard by us

5 Look Someone is being attacked

6 Who has been invited to dinner by Tom?

7 Lis said the fish had been eaten by her cat

8 All the books were left at home by me

9 Anew rule is being learn by the pupils at the moment

10 This story was written by my brother

11 The cloy has already been taken for a walk

12 I was promised a new computer by mu parents

13 The work can be finished by Cristy

14 The agreement will be reached by them tomorrow

15 The bicycle was being repaired by my father at seven o,clock

скорость товарного поезда равна 60 км / час. Чему равна его длина в метрах, если известно, что он проходит мимо неподвижного наблюдателя за 15 секунд?