1)установите соответствие между реагентами и типом реакций

1)установите соответствие между реагентами и типом реакций
реагенты:
А.4Na+O2=2NA20
Б.CaCO3=CaO+Co2
В.NaOH+HCl=NaCl+H2O
Г.Fe+CuSO4=FeSO4+Cu
тип реакций:
1.замещения
2.присоединения
3.обмена
4.разложения

2)установите соответствия между формулой вещества и классом соединения
формула вещества:
А. Al2O3
Б. FeCl3
В. HNO3
Г. KOH
класс соединения:
1.оксид
2.кислота
3.основание
4.соль
- Предмет:
  Химия
- Автор:
  duarte
- 5 лет назад

Ответы 1

Ответ:
1.а-2;б-4;в-3; г-1; 2.а-1,б-4,в-2,г-3
Объяснение:
- Автор:
  callum
- 5 лет назад
- 0
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Требуется помощь!!! 20 балов

Прочитайте текст и установите соответствия между текстами и их заголовками: к каждому тексту, обозначенному буквами A-G, подберите соответствующий заголовок, обозначенный цифрами 1-8. Используйте каждую цифру только один раз. В задании есть один лишний заголовок.

1 Better together

2 Good for your mind

3 Choose healthy holidays

4 Find what you enjoy

5 Make the right food choices

6 Food is not responsible

7 We make them richer

8 Preference for fast food

A. There are so many forms of exercise and physical activities and so many ways to enjoy them that you should not have any reason not to do so. How many different places are there to enjoy taking a walk? A park, a museum, downtown, and many more. How about the different types of exercise besides walking? There’s riding a bike, playing tennis, football, lifting weights, yoga, dancing, gardening, and cutting the grass. Try different activities and you will see what you like.

B. All too often, people snack on unhealthy foods because they are easy to get. If you are out for the day, make sure to bring some fruit, yoghurts, chopped up vegetables, popcorn, or some crackers so that you won’t eat junk food. Choosing healthy foods for snacking is also a great way to add extra vitamins and minerals to your diet. If you find you are snacking because you are bored, find something else to do. Go for a walk or email a friend – anything to take your mind off food.

C. How to be more active when you have a rest from school or work? The choice is wide. A running camp in the Alps, retro yoga on the Isle of Wight, freestyle skiing in Switzerland, mountain biking in Vermont – you can get active with one of these healthy trips. It will change your life for the better: you’ll be fitter and thinner. Pretty nature will take your mind off your work.

D. A new study says we are fat because we move much less, not because we eat more. A new analysis of eating habits and activity levels accuses our inactive lifestyle of obesity. People are not eating any more than they used to over the last 20 years, say researchers. What has really changed, however, are exercise levels or how much people move – or rather, don’t move. 40% of adults say they are involved in no physical activity. 20 years ago the figures were 15%.

E. Regular running can reduce your risk of chronic illnesses. It helps to keep you healthy. It can also boots your mood and keep your weight under control. Besides, it is widely accepted that running makes you feel good! Running helps to get rid of excessive adrenalin and other stress hormones. It can really help with staying calm, relaxed, and keeping things in perspective – and free your mind from daily worries and problems. Many people say running is their best thinking time.

F. Once you have become overweight or obese, your body wants more calories just to keep warm and move around normally. Obesity increases the body’s needs for food and makes it harder to be active. And that plays straight into the pockets of the food and drink industry: extra bodyweight is a pot of gold for food companies as an overweight child will eat 10-20% more food in its life than a normal-weight one.

G. Family meals may be making you healthier. Eating together – even if it’s just once or twice a week – boosts how much fruit and vegetables kids eat. Watching your parents and brothers or sisters eat teaches you good habits. Kids whose families always ate together had the recommended five portions of fruit and vegetables each day. Experts say if children are eating better in childhood, they will be more likely to make healthier choices in adult life.
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