Предмет: Химия, автор: kirillshnaider0

ЗАДАНИЯ: 1. Определите молярную концентрацию (моль/л) хлорида натрия, если в 250 мл раствора содержится 5 г растворенного вещества

Ответы

Автор ответа: muztau30

2

Ответ:

Сначала нам надо найти количество моль вещества. n=5/58.5=0.17 моль

потом объем в литрах V=250/1000= 0.25 л

делим моли на объем С=0.17/0.25=0.68 моль/л

Объяснение:

Если честно, я давно не решал такие задачи. люди в комментах поправьте меня. Если все правильно поставьте лучший ответ.

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: История, автор: prihodkoangelina388

помогите пожалуйста

1 год назад

Предмет: География, автор: reztt0146

Пж помогите!!!!!!!!!!!!

1 год назад

Предмет: Английский язык, автор: gosdlfid

make up guestions
When William was 18 years old he left his village in Wales and went to London

1 год назад

Предмет: Русский язык, автор: barianagerniak

ПОМОГИТЕ ПОЖАЛУЙСТА!!!СРОЧНО
Укажите предложения со смысловыми частицами.

а) Закат давно угас.
б) За дождем не видно было ни моря, ни неба.
в) Пусть на всей планете радуются дети.
г) Как прекрасна земля!

7 лет назад

Предмет: Английский язык, автор: lerakleva

Срочнооо!
6. … each other for a long time?' ‘Yes, since we were at school.'
A Do you know B Have you known C Have you been knowing
7. Sally has been working here …
A for six months B since six months C six months ago
8. It's two years … Joe.
A that I don't see B that I haven't seen C since I didn't see D since I last saw
9. It … raining for a while, but now it's raining again.
A stopped B has stopped C was stopped
10. My mother … in Italy.
A grew up B has grown up C had grown up
11. … a lot of sweets when you were a child?
A Have you eaten B Had you eaten C Did you eat
12. Jack… in New York for ten years. Now he lives in Los Angeles.
A lived B has lived C has been living
13. The man sitting next to me on the plane was very nervous. He …
14. before.
A hasn't flown B didn't fly C hadn't flown D wasn't flying
15. Katherine was sitting in an armchair resting. She was tired because very hard.
A she was working B she's been working C she'd been working
16. …a car when you were living in Paris?
A Had you B Were you having C Have you had D Did you have

7 лет назад