Предмет: Химия, автор: dogleono2

Скласти рівняння реакцій за допомогою яких можна здійснити такі перетворення:

На фото.

Приложения:

Ответы

Автор ответа: bezsmertnay
2

повністю фото не змогла розмістити

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ПОМОГИТЕ ПОЖАЛУЙСТА, ОЧЕЕЕНЬ СРОЧНО
1 Укажите группу веществ, которые содержат только кислотные оксиды

А) CO2, MgO, SiO2

Б) SO2, SO3, P2O5

В) SO2, P2O5, K2O

Г) N2O5, N2O, NO

2 Укажите вещество х в схеме реакций: x + HCl → CuCl2 + H2O

A) Cu

Б) CuO

В) CuSO4

Г) Cu (No3)2

3 Укажите вещества с которыми может реагировать натрий гидроксид:

А) SO3, H2O

Б) SO3, Zn (OH)2

В) CO2, K2CO3

Г) HCl, CaO

4 Укажите группу веществ, с которыми реагируют кислоты:

А) основные и кислотные оксиды, щелочи

Б) основные и атмосферные оксиды, основания

В) основания, щелочи, вода

Г) соли, кислоты, щелочи

5 Укажите реагенты, с помощью которых можно получить калий сульфат:

А) калий + литий сульфат

Б) барий сульфат + калий гидроксид

В) калий гидроксид + сульфатная кислота

Г) калий гидроксид + натрий сульфат
6 лет назад
Предмет: Английский язык, автор: ryeiefifjfjdkkmmfh
George Washington ..... the first president of the USA *
were
was
did
..... your grandparents British? *
Was
Were
Did
The children ..... at school yesterday. *
didn't be
wasn't
weren't
My watch ..... working yesterday. It needs a new battery. *
was
stopped
didn't stop
I ..... my little sister to the zoo last Saturday. *
took
was taking
taked
My sister started her first job ..... . *
two months
two months ago
last two months
The letter isn't here because the post ..... this morning. *
didn't arrive
didn't arrives
didn't arrived
..... to Rebecca's party last night? *
Did you went
Did you go
Went you
Those shops are new. They ..... here ten years ago. *
weren't
did not be
wasn't
We ..... dinner at eight o'clock last night. *
were eating
was eating
did eating
I ..... living there in October. *
didn't
weren't
wasn't
When we got there, it was cold but it ..... . *
not rain
wasn't raining
rained
The children were having breakfast when the postman ..... . *
arrived
did arrive
was arriving
Jeremy ..... his car to the garage six times last year. *
taking
took
was taking
We ran to the station and ..... the first train we saw. *
was getting on
got on
were getting on
I got a text message while I ..... for the bus. *
waited
was waiting
were waiting
When I was a child I ..... stay up late. *
didn't use to
didn't used to
used to not
..... go to the same school as my sister? *
Did you use to
Did you used to
Did use you
My best friend ..... to a fantastic concert last Saturday. *
was going
used to go
went
My aunt ..... in an international bank for a fifteen years ago. Now she doesn't work. *
used to work
worked
use to work
6 лет назад