Осуществить цепочку превращений

1. H2So4 -> Na2SO4 -> NaOH ->(сверху над стрелкой HCl) X

2. HNO3 -> NH4NO3 -> (сверху над стрелкой КОН) Х -> (cверху над стрелкой HCl) NH4Cl

Хотя бы одно, пожалуйста

органы пищеварительной системы речного рака

помогите пожалуйста моя домашка во вложениях

                                                        Test

Choose the correct variant                                                                  

1) Ussually I ... the violin but now I ... the piano.( play, am plaing ;  am playing, play )

2) I ... a message from kelly last Saturday.( have got, got)

3) My mother wasn,t at the shop when I ... .( had come, came)

4) Some smiling men ... the piano.( where playing, had played)

5) If we ... the 1030 train, we ... too early.( sholl have; are ... coming; are having, will ... come )

6) I think he ... the aoldress already.

7) The road ... by the company last year.( isn,t used, wasn,t used)

8) Our car ... at the moment.( is being cleaned, is cleaned)

9) Our town ... during the war.(was being destroyed, was destroyted)

10) They haven,t been at the seaside ... 3 years . (since, for, about)

11) This book was written ... a gifted writer. (with, at, by)

12) I haven,t seen you ... ages. (for, since, over  )

13) Don,t make ... noise. We aren,t finished yet. (a, the, any, -)

14) We are going to ... south of ... Jrance for our holiday. (-,- ; the, the ; the,- ; a,-)

15) I bought this coat at ... Marks Spencer. (a, the, an,-)

16) Nobody gave me a book, ... ? (did they, didn,t they, did he)

17) I am not ugly, ...? (am not I, am I , are I )

18) Say this word correct/ corectly.

19) I speak English bad/badly. Let,s speak French.

20)  Be quickly. The taxi has arrivd.

21) Would you ... me to come on Monday.( prefer, like)

22) What is the ... of his garden. ( region, area. territory)

23) He was born in a poverty/poor family

24) Did you like our  ... ? (journey, travel)

25) I have hurt the ... of my right hand. ( fingers, toes)

помогите с чем нибудь(