какая масса соли получится при взаимодействии 9,3 грамм оксида натрия и 14,6грамм соляной

какая масса соли получится при взаимодействии 9,3 грамм оксида натрия и 14,6грамм соляной кислоты
- Предмет:
  Химия
- Автор:
  jordin
- 6 лет назад

Ответы 2

спасибо
- Автор:
  jayden627
- 6 лет назад
- 0
Na2O+HCl=NaCl+H2O реакция типа недостаток-избыток; вычисляем кол-во вещества n (Na2O)=m/M=9,3/62=0,15 моль и кол-во вещества n (HCl)=m/M=14,6/36,5=0,4 моль, в недостатке оксид натрия,значит считаем по нему; m(NaCl)=nM=0,15×58,5=8,775 г
- Автор:
  movance
- 6 лет назад
- 0
Добавить свой ответ

Еще вопросы

8 м - 5 9 дм + 1 м 6 д м =
- Предмет:
  Математика
- Автор:
  arianareyes
- 6 лет назад
- Ответов:
  
  2
- Смотреть
соедините пептидной связью аминокислоты: валин C3H7-CHNH2-COOH и глицин CH2NH2-COOH
- Предмет:
  Биология
- Автор:
  jose833
- 6 лет назад
- Ответов:
  
  1
- Смотреть
The Future Continuous / The Future Simple

1. This time tomorrow they (sit) in the train on their way to Chicago.

a. will sit

b. will be sitting

c. are sitting

2. Don’t phone Jim from 5 to 6 – he (have) English.

a. Had

b. is having

c. will be having

3. Why are you in a hurry? If you arrive at 8 o’clock, they (still/cook) the meal.

a. still are cooking

b. are still be cooking

c. will be still cooking

4. - I’m not sure I’ll recognize Eve. I haven’t seen her for ages. - She (wear) a dark blue pullover and jeans.

a. Wears

b. will be wearing

c. is wearing

5. He (sleep) when you come back tonight.

a. will be sleeping

b. would be sleeping

c. slept

6. - Let’s meet at the station at 5 o’clock. - OK. I (wait) for you there.

a. ’ll wait

b. will be waiting

c. wait

7. I (work) for my exam on Philosophy all day tomorrow.

a. have been working

b. works

c. will be working

8. . “ … you (see) Alex tomorrow?” – “Of course I will. I (see) him at the Board meeting.”

a. Do you see, see

b. Would you see, ’d see

c. Will you be seeing, will be seeing

9. Next Friday, the President (celebrate) ten years in power.

a. Celebrates

b. will celebrate

c. will be celebrated

10. The plane (travel) at twice the speed of sound when it passes overhead.

a. will be traveling

b. travels

c. will travel

11. “I wonder if that terrible wind (blow) tomorrow.” – “Oh, yes. The weather forecast says it (blow) for another two weeks.

a. will blow, will blow

b. will be blowing, will be blowing

c. will blow, blows

12. I (say) more about that topic in my next lecture.

a. will say

b. am saying

c. will be saying

13. After the operation you (not/do) any sport for a while.

a. didn’t

b. don’t

c. will not be doing

14. She (perform) every day until the end of the month.

a. Performs

b. will be performing

c. shall be performing

15. We (go) to my brother’s house again for Christmas.

a. will be going

b. go

c. are going

16. I (see) Tom on Tuesday. That’s when we usually meet.

a. Saw

b. will see

c. will be seeing

17. We (join) you in half an hour.

a. will join

b. will be joining

c. shall join

18. … you (use) the computer for long? I need it

a. Do you use

b. Will you be using

c. Will you use

19. Is it alright if I come at about 8.30? - No, I (watch) the football then.

a. will be watching

b. will watch

c. am watching

20. What time your friends (arrive) tomorrow?

a. will be your friends arriving

b. will your friends be arriving

с. are your friends arriving
- Предмет:
  Английский язык
- Автор:
  adrianaford
- 6 лет назад
- Ответов:
  
  1
- Смотреть
Пять слов состоящие из приставки,корня и окончания
- Предмет:
  Русский язык
- Автор:
  hoochhartman
- 6 лет назад
- Ответов:
  
  0
- Смотреть

какая масса соли получится при взаимодействии 9,3 грамм оксида натрия и 14,6грамм соляной кислоты

Ответы 2

Топ пользователей