Предмет: Химия, автор: tanyadich6272

Обчисліть об‘єм кисню (н.у.) який необхідно використати для спалювання 20 л суміші метану й бутану? Об‘ємна частка бутану в суміші становить 70%

Ответы

Автор ответа: drainer1
0

V(CH4, C4H10) = 20 l

W(C4H10) = 70%

V(O2) - ?

V(C4H10) = 20 l * 0.7 = 14 l

V(CH4) = 20 l - 14 l = 6 l

1) CH4 + 2O2 = CO2 + 2H2O

по УХР: n(CH4) = 2n(O2) ; V1(O2) = 6 l * 2 = 12 l ;

2) 2C4H10 + 13O2 = 8CO2 + 10H2O

По УХР: 2n(C4H10) = 13n(O2) ; V2(O2) = 14 l * 13 / 2 = 91 l ;

V(O2) = 91 l + 12 l = 103 l

Ответ: 103 l .

Похожие вопросы
Предмет: Английский язык, автор: lolikbolik45
Задания
Английский язык, 11 класс
*Внимание! Во всех вопросах только один правильный ответ.

1. I … Mary tonight. We have already arranged it.
A) see
B) seeing
C) am seeing
D) will see

2. I think you … a doctor one day.
A) become
B) becomes
C) is becoming
D) will become

3. Look at the sky! It … a good day.
A) is going to be
B) is being
C) will be
D) is

4. He denied … the vase.
A) breaking
B) to break
C) break
D) broke

5. She insists … meeting next Sunday.
A) -
B) on
C) in
D) of

6. I’m so sorry. I didn’t mean to upset you.
A) That’s shocking!
B) No problem. Apology accepted.
C) Oh, it was nothing.
D) Cheer up! Things can’t be that bad!

7. We break … for the summer next week.
A) up
B) into
C) down
D) through

8. I am not keen … sport.
A) of
B) off
C) on
D) in

9. In my last job I … work from home if I wanted to.
A) were allowed to
B) could
C) need
D) needed

10. He made two films. … was successful.
A) Neither films
B) Neither of the film
C) Neither film
D) Neither of films

11. I’ve lost my bag! I’ve asked … , but … has seen it.
A) everywhere … nowhere
B) everybody … nobody
C) everything … nothing
D) nobody … everybody

12. I’ve never … . Have you?
A) a tattoo done
B) had a tattoo do
C) had done a tattoo
D) had a tattoo done

13. If I … younger, I … travel around the world.
A) were … would
B) am … would
C) was … will
D) were … will

14. I’ve never been to London before. … it a beautiful city?
A) Doesn’t
B) Don’t
C) Isn’t
D) Does

15. An urgent letter … all the parents.
A) sent to
B) was sent to
C) sent
D) send
Предмет: Математика, автор: Аноним
Предмет: Физика, автор: dasha228917