Ответы » Английский язык (18796 вопросов)

Вопрос № 911970 - Английский язык

Расположите пропущенные предложения в таком порядке, чтобы получился связный текст.
1_______. It is formed when acetyl chloride or acetic anhydride acts on ethyl alcohol. 2_______.
Ethyl acetate is a colourless, mobile liquid, with a pleasant fruity odour. 3_______. It is soluble in water and is miscible with alcohol, ether and chloroform, forming neutral solutions. 4_______.
Варианты ответов
  • Ethyl acetate is prepared by the interaction of alcohol and glacial acid in the presence of concentrated sulphuric acid
  • Ethyl acetate is a typical example of an ester of an organic acid
  • When ethyl acetate is boiled with water under reflux condensation, it slowly undergoes hydrolysis
  • Its weight per ml is 0.9 and it boils at 77°
Тип вопроса: Вопрос на последовательность
Правильный ответ
Ответ на этот вопрос уже получили: 1 раз(а)
Помогли ответы? Ставь лайк 👍
Расскажи другу:
Вопрос задал(а): Анонимный пользователь, 13 Ноябрь 2020 в 16:10
На вопрос ответил(а): Анастасия Степанова, 13 Ноябрь 2020 в 16:10

Похожие вопросы

Вопрос № 911766

Расположите пропущенные предложения в таком порядке, чтобы получился связный текст
1_______. First of all we advise you to choose wine and cheese for preparing a tasty dish. 2_______. You could take cheddar, for example. You need alcohol in a fondue, not just for flavour, but to lower the boiling point and stop the protein in the cheese from curding. 3_______. 4_______.
Fondue is a French word for “melted” because the principle of its preparing is based on cheese or fat melting
A Swiss cheese fondue is normally made from the Swiss cheese Emmentaler and Gruyere, but any hard cheese can be used
Use dry Swiss white wine if you can, or a Riesling
Don’t forget about the fondue set, it consists of a cast-iron set, a tablemat stand and special forks.

Вопрос № 911493

Расположите пропущенные предложения в таком порядке, чтобы получился связный текст.
1_______. The aggregate is both coarse (e.g. stones and gravel) and fine (e.g. sand).2_______.
1) Put two shovelfuls of sand into a wheel-barrow.
2) Add a shovelful of cement.
3) Mix these thoroughly with a shovel.
4) Add four shovelfuls of gravel. Mix thoroughly.
5) 3_______. Add a little water with a hose. CAUTION: Do not add all of the water – only a little.
6) Mix the materials thoroughly.
7) 4_______.
Concrete is made from cement, aggregate and a small amount of water
The coarse aggregate, fine aggregate and cement are usually in the ratio 4:2:1
Make a hollow in the middle
Add more water and mix again until the concrete is the correct thickness

Другие вопросы по предмету Английский язык

Вопрос № 911971

Расположите пропущенные предложения в таком порядке, чтобы получился связный текст.
1_______. It can be called, molecular biology. Biochemistry is known to be the study of the structures and reactions of the thousands of compounds involved, in life process. 2_______.
Living things are supposed to represent the most efficient, sophisticated, compact chemical “factories” ever known. 3_______? When the body is afflicted by disease or by a wound how does the body protect itself and repair the damage? 4_______.
The chemistry of life, or “biochemistry” as chemists call it, is an area in which the classical fields of chemistry and biology meet
It is considered to be the most complex area of chemistry
How, for example, do cells of the body know when to divide and multiply into new cells having the same characteristics as the original cells
We know these processes to involve thousands of different chemical compounds

Вопрос № 911973

Прочитайте текст.
The following ailments are prone to occur in cigarette smokers:
1. Cancer of the lung. Heavy cigarette smokers are 30 times as liable to develop cancer of the lung as non-smokers are. There is overwhelming evidence that lung cancer is caused by cigarette smoking.
2. Bronchitis and emphysema. Prolonged cigarette smoking commonly leads to progressive cough and breathlessness, ultimately leading to respiratory incapacity. Gastric and duodenal ulcers take longer to heal in cigarette smokers.
Закончите предложение:
Gastric and duodenal ulcers take longer to heal in …
alcoholic
cigar smokers
non-smokers
cigarette smokers

Вопрос № 911975

Прочитайте текст.
Tobacco claims 390,000 lives a year, 90,000 more than earlier estimates. Two-thirds of those deaths result from cardiovascular disease, lung cancer and chronic respiratory ailments like emphysema. The average male smoker is 22 times as likely to die from cancer is a nonsmoker. On the bright side, the USA has made substantial strides in curtailing cigarette use. Only 29 % of adults now light up, down from 40 % in 1965.
Закончите предложение:
Two-thirds of deaths result from cardiovascular disease, lung cancer and chronic respiratory ailments like …
bronchitis
cold
pneumonia
emphysema

Вопрос № 911976

Прочитайте текст.
Cigarette use was declining among teenagers, but has now leveled off. Children, especially girls, are taking up tobacco at a younger age. Among high school seniors who have ever smoked, quarter took their first puff by the sixth grade and half by the eighth. Restrictions on children’s access to cigarettes have weakened; many stores routinely ignore minimum age of purchaser laws.
Закончите предложение:
Girls are taking up tobacco at a …
senior age
junior age
elder age
younger age
А еще можно заказать:
Лабораторные от 200 руб Контрольные от 200 руб Курсовые от 500 руб Дипломные от 3000 руб Отчет по практике от 500 руб