Предмет: Химия, автор: Белинг

Срочно! Чем отличается карбоксильная группа от карбонильной группы?

Ответы

Автор ответа: TanyxaMolchanova

Карбонильная группа- входит в состав альдегидов, кетонов, карбоновых кислот, хлорангидридов карбоновых кислот, их ангидридов и амидов,может входить состав карбоксильной группы.
Карбоксильная группа - одновалентная группа характерная для карбоновых кислот. Состоит из карбонильной и гидроксильной (-ОН) групп

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Русский язык, автор: reginakamila

Вера,Саша,Лариса,Петя,Нина.как выделить суффиксы в словах помогите?

2 года назад

Предмет: Английский язык, автор: XgarikX

1) Try to translate sentences into Russian: They lack life experience and are not self-confident enough. It always works the same. I cannot make an informed choice. 2) Give opposite meaning of the words: cloudy avoidable understanding unreal 3) Complete the summary of the text. Fill in the words from the text. Do not write more than two words each gap. The author of the article thinks that the opinion that the youth is the best part of human life may be true. He presents rather________arguments for the idea. The strongest argument is that teenagers have fewer_____________ in comparison with adult people, let along the elderly. And it goes without saying that healthy people feel stronger, more energetic, more optimistic and consequently happier than people in poor health. However, the author also presents some facts , which do not go with the _____________idea that “youth” and “happiness” are synonyms. Psychologists say that teenagers do have problems. Most of them are caused by their lack of_____________and lack of self-confidence. Another typical teenage problem is that they cannot compromise. Looking for an ideal relationship they often feel bitterly______________with their friends who are not able to meet high requirements. Worries about the future career add up to the teenager syndrome. It’s extremely difficult for a 15 – 16 year old person to make an _____________, as they don’t have enough information yet. At the end of the article the author concludes that being a teenager in our dynamic world is rather____________. Adults should realize that teenagers often need their support and advice. Is it easy to be young in the 21st century ? Part 1. There is an opinion that youth is the best part of a person’s life. What is it – a fact or a stereotype ? Happy Youth supporters’ arguments sound very convincing. According to them, when you are fifteen or sixteen, the future seems cloudless, the world around you is beautiful and friendly, and you feel strong and optimistic. Neither health nor other problems trouble you yet. You have friends who never betray you. Conflicts are certainly unavoidable, but they don’t last long, and it’s usually not a problem to survive through them. This is a conventional idea about young people. But is it true ? Part 2. Psychologists insist that they have lots of work with teenagers. In their “happiest” years they have too many problems, and in most cases they don’t know how to solve them. They lack life experience and are not self-confident enough. They are often too categoric and can’t forgive other people’s faults and mistakes. A quarrel or misunderstanding can lead to serious sufferings. “I don’t feel happy at all”, says Jack Green, 14. “I have no friends. It always works the same. At first it seems that I’ve found a real friend, but then I feel very disappointed because he betrays me – tells silly stories about me in the school, or doesn’t help when I need help. It has happened many times”. Part 3. “The thing which worries me a lot is my future job”, says Helen Carter, 15. “To have a good life in the future, I have to find a good job. If I want to find a good job, I have to get a good education first. But how am I supposed to choose my career line ?! I don’t know what’s good and what’s bad for me. I cannot make an informed choice. I need to make some decision about my education very soon and I feel awfully scared. What if I make a mistake and get an education for a wrong job ? This means that I’ll have to do the job which I don’t like or even hate. This makes me feel sick”. Part 4. On reading these words we , adults, realize that being young is not so easy. It’s rather challenging to be a teenager of the 21st century, when the world changes so rapidly and people have to work very hard to keep pace with it *. Who can help young people feel less stressed out and more self-confident ? Who can provide them with information and advice ? The answer, I suppose, is evident.

2 года назад

Предмет: Русский язык, автор: aziz231006

В каких словах на месте пропуска пишется буква е удивление оживать гнездо воспевать