Предмет: Химия, автор: roma3991

Какие из приведенных веществ генетически взаимосвязаны?
BaO,CO2,Mg(OH)2,HCL,Mg,NaNO3,MgCL2,K,MgO.
Составьте уравнения реакций,подтверждающих их генетическую связь.

Ответы

Автор ответа: svetka1574
0

Mg -> MgO -> MgCl2 -> Mg(OH)2

2Mg + O2 = 2MgO

MgO + 2HCl = MgCl2 + H2O

MgCl2 + 2NaOH = Mg(OH)2 + 2NaCl

Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Английский язык, автор: ruslankulikov05
Reading
Read the text and do the tasks.

People began to travel ages ago. The very first travellers were explorers who went on trips to find wealth, fame or something else. Their journeys were very dangerous but still people keep on going to the unknown lands.
Nowadays it is not as dangerous and much more convenient. Do you want to go somewhere? Hundreds of companies are there to help you. They will take care about your tickets and make all the reservations needed. You don't speak the language of the country you go to? There are interpreters that will help you.
Tourism became a very profitable business because people are ready to spend their money for the great opportunity to have a great time learning about new countries, going sightseeing, resting and enjoying themselves.
I like travelling. First of all, my family and I usually have long walks in the country. Such walks are called hikes. If we want to see countryside we have to spend a part of our summer holidays on hikes. During such hikes we see a lot of interesting places, sometimes we meet interesting people. We take our rucksacks. We don't think about tickets and there is no need to hurry up. As for me, it's more comfortable to travel by train and by plane. But it's difficult to buy tickets for the plane. That's why we buy our tickets beforehand.
When I spend a holiday in travelling I always take a camera with me and photograph everything that interests or pleases me: the sights of a city, views of mountains, lakes, valleys; the ruins of ancient buildings. Some years later that will remind me the happy time that I had.


Task 1. Find in the text the words which mean:
1. a long walk in the country
2. a piece of paper or card that shows you have paid for a journey
3. a person who travels round a place in order to learn about it

Task 2. Answer the questions.
4. Who were the first travellers?
5. How can a lot of companies help people to plan (organize) their holidays?
6. Is tourism a profitable business? Why?

Task 3. Mark the sentences as True or False.
7. Travelling nowadays is as comfortable as it was ages ago.
8. Going hiking people don’t need to worry about tickets.
9. The author takes some photos with her on a holiday.
6 лет назад
Предмет: Математика, автор: balymmi
Округлите десятичные дроби до десятичных: 3,72; 9,461.
6 лет назад
Предмет: Математика, автор: sinknehtnikita
5. Вычислите (3 – 2) - 7 + 4/3​
6 лет назад
Предмет: Алгебра, автор: slobakopeika
вычислить син405градусов плюс кос225градусов умножить тандем 225градусов
9 лет назад
Предмет: Биология, автор: albinabekker
С помощью каких приборов можно рассмотреть клетку?
9 лет назад