из перечисленных формул выпишите отдельно формулы оксидов, оснований, кислот и солей, дайте им названия:Cu(no3)2  N2o5  NaOh  CaO   Fe2(so4)3  h2CO3   Na2o  Mn(OH)2   k2so3  h2SIO  Cl2o7

составить косвенную речь с такими предложениями :
1. Aidar says : " I have got acquainted with an English boy of my age ".

2. Nick asks him : " Who is he and where from ?"

3. Aidar answers: " He is John Smith. His father has come to Astana from London as a businessman for several weeks."

4.Nick asks Aidar : "Are you going to introduce him to me ? :

5.Aidar answers : ' Not only to you . Let's invite him to our class . I think he will agree .'

6.Asel adks : "what are you talking about ?"

7.Nick says : "No secret at all, Aidar has got a good idea. He proposes to invite an English boy John Smith to meet with our class ".

8. Asel agrees : " Oh! It's really a good odea but first we should ask our English reacher for the permission to do it '.

А) Li + N2 → Li3N                                      

Б) Al2O3 + Na→ Na2O + Al                     

В) SO2 + O2 → SO3                                   

Г) HCl + Cu(OH)2 → CuCl2 + H2O       

ученикам 7 класса вопрос

Титул, присвоенный Петру I после победы в Северной войне.