Предмет: Химия, автор: atabysswalker

Найдите объем водорода (н. у.), который выделится при взаимодействии 31 г 86% водного раствора этиленгликоля с избытком калия

Ответы

Автор ответа: dasshtrudel
0

Ответ:

9,632 литра

Объяснение:

Каждый атом калия вытесняет атом водорода из этиленгликоля. Так водород молекулярен берется 2 моль калия на моль спирта.

n(H2)=n(C2H6O2)

M(C2H6O2)=62 г/моль

n(C2H6O2)=(31*0,86)/62=0,43 моль

V(H2)=0.43*22.4=9,632 литра

Похожие вопросы
Предмет: Русский язык, автор: kristinarudenk1
Предмет: Английский язык, автор: petroZ
Даю 25 баллов!!!
Task 1
Choose the right meaning from the box and then write a sentence with who.

[designs buildings - pays rent to live in a house or flat;
doesn`t believe in God - breaks into a house to steal things;
buys something from a shop - expects the worst to happen]

1. (an architect)________________________________________________________________
2. (a customer)_________________________________________________________________
3. (a pessimist)_________________________________________________________________
Task 2
Make one sentence from two. Use who/that/which.
1. A girl was injured in the accident. She is now in hospital.
______________________________________________________________________________________________________________________________________________________

2. A bus goes to the airport. It runs every half hour.
______________________________________________________________________________________________________________________________________________________

3. A building was destroyed in the fire. It has now been rebuilt.
______________________________________________________________________________________________________________________________________________________
Task 3
Correct the sentences where necessary.
1. I don`t like stories who have unhappy endings.______________________________________
2. Do you know the person that took these photographs?________________________________
3. What was the name of the person who phoned you ?_________________________________
Task 4
Look at the information and identify which one is meant. Use the shortest way of identifying where possible, e.g. the boy (he is tall) = the tall boy, not the boy who is tall.
1. the man (he has a beard) ________________________________________________
2. the woman (she plays golf) ________________________________________________
3. the woman (she is very thin) ____________________________________________
4. the young woman (she is in the office) ___________________________________________
Пожалуйста сделайте!