Предмет: Химия, автор: Olichkaaaaaaaa

1.    
Вкажіть реактив, який дає змогу відрізнити
пентан від бензену:
 А.  
Бромна вода


Б.   
Калій гідроксид


В.   
Вода


Г.   
Сульфатна кислота



Ответы

Автор ответа: Крис27
0
А)
качественной реакции на алканы нет! их распознают методом исключения!
Автор ответа: Крис27
0
с помощью бромной воды распознают бензен!!!
Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Алгебра, автор: FIZYY
пж решите , с решением​
6 лет назад
Предмет: Английский язык, автор: olgageneralova67
Read the text and mark the stateme ita True T). Falsa (F),
Not Stated (NS).
Bicycle Helmets
Tom, a friend of mine, a college student, loves riding his bicycle at
weekends. He especially enjoys taking long des through the city. To my
surprise, I found he never wears a helmet.
I began to wonder why a person who spends to much time and money de
veloping his mind doesn't wear a helmet. Ridi cg a bicycle without a helmet
greatly increases his risk of brаin injury (чері учно-мозговая травма).
),
Each year, over 50,000 people in the United States suffer some torm of
brain injury from a bicycle accident. Unfortunately, many of them have
ong-lasting effects. Getting medical treatment (neue He) can cost very
big money and can take many years. Compare this waste of time and
money with the $40 you spend on a bicycle helmet.
It is not always easy to get a friend to wear a bicycle helmet. Be patient
Give your friend time to come to his or her wn decision about wearing
one. Invite your friend to take a bicycle rideath you Without saying any
thing, put your helmet on quietly. If you stop at a store during your
bike
ride, keep your helmet on. This will send a mussage that you are comfort
able wearing a helmet both on and of your bike. If you rernove it too
quicklyyour friend may think wearing a helmet is not very nice.
Buying your friend a helmet as a present may not be such a good idea.
Your friend may feel you are pushing too hard. Each perse needs to
reach his or her own conclusions (Bb BOND) about safety and how to
protect the body
1. Tom goes to university by bike.
2. He loves riding in the country.
3. Riding a bicycle without a helmet in very dangerous.
4. Over 500 bicycle accidents happen
in the USA every day
5. Medical treat ent for brain injury is very long
and expensive (poporod).
6.
Bicycle helmets are not expensive
7. One should make his friend wear
a helmet when they go bike riding
8. It takes several months to get
a friend to wear a bicycle helmet
9. Bicycle helmets as birthday presents are very popular,
10. If you set an example it'll help you trend
start wearing a bicycle helmet. ПОЖАЛУЙСТА ПОМОГИТЕ​
6 лет назад
Предмет: Физика, автор: marina200614
в ядре атома
лития 3 протоны, а в ядре атома магния 12 протонов . Как и всколько раз отличаются заряды ядер лития и магния ​
6 лет назад
Предмет: Математика, автор: maksxim

первые 2 часа рабочий вытачивал по 12 деталей в час а следующие 3 часа по 7 деталей в час . Сколько в среднем вытачивал рабочий за 1 час
9 лет назад
Предмет: Химия, автор: Chenel53

Вычислите объем углекислого газа, который образуется при действии раствора, содержащего
30 г соляной кислоты, на карбонат кальция массой 25 г.

 

решите, пожалуйста, очень подробно.
9 лет назад