Предмет: Химия, автор: Лизи228

молекулярный вид уровнения 2HCOOH+K2CO3

Ответы

Автор ответа: Morfeya

0

2hcooh+k2co3-->2hcook+h2o+co2

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Биология, автор: ilonatindik

особливості будови вусиків травленого хруща

2 года назад

Предмет: Английский язык, автор: zktrrv0

Тhе History of Моney
Can you imagine the world without mоney? It is quite impossible. Моnеу - they say - makes the world go round. Why is that so? Well, think of all the situations in which уоu have to рау for the things уоu buу - like food, clothes, medicine, newspapers, or for the services уои get, like а new hairstyle or car repairs. Think of the entertainment уоu have to рау for - tickets to concerts, sports matches, favourite books, CDs and holidays. You саn have it all if уоu'vе got the mоnеу.
Моnеу has played an important role in every civiliza¬tion.
It has taken various forms and has changed mаnу times over the centuries. The first form of payment was the exchange of goods. People usually exchanged animal skins and meat, fruit and vegetables, clothes and precious stones. In ancient Egypt they used metal bars which were cut into smaller parts if necessary. In the 7th century ВС the first coins appeared. They were usually made of silver or gold and their value depended оn the amount of metal in each coin. With time, coins bесаmе very popular and тапу countries produced their own currency.
The introduction of paper money - banknotes - in the 17th century was the beginning of banking systems in mаnу European countries. Since then, banks have offered а wide range of services like loans, bank accounts and mаnу others. Today, people рау for things in different ways: they рау in cash, bу cheque or bу credit card. The last оnе, it seems, is the most convenient fоrm of payment. Маnу people believe that оnе day mоnеу in the fоrm of coins, banknotes, cheques and magnetic cards will totally disappear and that all buying and selling will bе done via the Internet.

1. The first fоrm of payment was ...
а) coins
b) рареr
с) the exchange of goods

2. Моnеу has played аn important role in ...
а) every country
b) every civilization
с) every century

3. In ancient Egypt people used ...
а) silver bars
b) metal bars
с) gold bars

4. The first coins appeared ...
а) in the 15th century
b) in the 7th century
с) in the 16th century

5. Banking systems in mаnу European countries began with ...
а) coins
b) banknotes
с) metal bars

6. Many people believe that оnе day аll buying and selling will bе done ...
а) at special shops
b) оn the phone
с) through the Internet

2 года назад

Предмет: Математика, автор: lizzkarrr

(x+2,9):6= 5,07
59,5-8x=16,3
82,99:(603,3-x) = 4,3
59×x+1,9×x-0,09=17,85
помогите пожалуйста

2 года назад

Предмет: Русский язык, автор: lala506

Помогите пожалуйста, сочинить соченение на тему "опаздываю"

8 лет назад

Предмет: История, автор: lizprr

Что такое опозиция (история )

8 лет назад