Предмет: Химия, автор: kirilllrogalsky

Обчислити де більша массова частка Оксигену:в оксиді карбону (IV) чи в оксиді карбону (II)?

Ответы

Автор ответа: yvcnk

0

Ответ:

Объяснение:

Mr(CO2)=44

W(C)=Ar(C)*n/Mr(CO2) *100%=12*1/44 *100%=27%

W(O)=Ar(O)*n/Mr(CO2) *100%=16*2/44 *100%=73%

( карбон оксид )

Предыдущий вопрос

Следующий вопрос

Интересные вопросы

Предмет: Английский язык, автор: mitra

Кто решит правельно того выберу лучшим!!
These are the answers.What are the questions?

who ...? My best friend.
When ... ? Yesterday after school.
How ...? Very well indeed.
Whose ...? My cousin s.
What ...? Usually I have tea and a sandwich.
Why...? Because I love it.
How ofter...? Every weekend.

Make up the sentences. с переводом
1)me/he/where/tell/lives/.
2)does/he/where/live/?
3)I/likes/don t/she/know/what/.
4)does/what/like/she/?
5)do/spend/summer/you/holidays/your/where/usually/?
6)want/where/usually/summer/your/I/to know/holidays/you/spend?

2 года назад

Предмет: Английский язык, автор: kissa76

раскройте скобки, употребляя глаголы в Present Continuous или present Indefinite.
1. I (to read) now. I ( to read) every day.
2. He (to sleep) now. He ( to sleep) every night.
3. We ( to drink) tea now. We (to drink) tea every morning.
4. They ( to go) to school now. They ( to go) to school every morning.
5. I ( not to sleep) now. I ( not to sleep) in the daytime.
6. She ( not to drink) coffee now. She ( not to drink ) coffee after lunch.
7. We ( not to watch) TV now. We ( not to watch) TV in the morning.
8. They ( not to eat) now. They ( not to eat) at the lesson.
9. My mother ( not to work) now. My mother ( not to work) at an office.
10. You ( to work) now? You ( to work) every day?
11. He ( to play) now? He ( to play) in the afternoon?
12. They ( to eat) now? They ( to eat) at school?
13. Your sister ( to rest) now? Your sister ( to rest) after school?
14. What you ( to do ) now? What you ( to do) every morning?
15. What you ( to read) now? What you ( to read) after dinner?
16. What they ( to eat) now? What they ( to eat) at breakfast?
17. What your brother ( to drink) now? What your brother ( to drink) in the evening? Пожалуйста помогите)

2 года назад

Предмет: Немецкий язык, автор: МонаЛиза1503

Помогите пожалуйста! Под буквой c, d

2 года назад

Предмет: Математика, автор: снеговик2018

Помогите мне пожалуйста

8 лет назад

Предмет: Русский язык, автор: Cleverandclever

Синтаксический разбор предложения: Люди с давних пор пытались сосчитать звезды, чтобы лучше ориентироваться на небе.
+ Характеристика предложения

8 лет назад