Предмет: Химия, автор: 081177101

как приготовить 400 г раствора глюкозы с массовой долей 10 %, имея раствор с массовой долей 30 % и воду?

Нужно подробное решение.

Ответы

Автор ответа: shiokko

1

Узнаем сколько в 400проц растворе вещества(глюкозы). Для этого массу раствора умножим на процентное содержание. 400*0,1 равно 40г. Получается, в 30проц растворе было 40 г вещества. Узнаем массу раствора 30проц. Для этого разделим массу вещества на процентное содержание. 40/0,3 равно 133г Найдем массу воды которую надо влить в 30процентый раствор для получения 10процентного. 400-133 равно 267

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Русский язык, автор: madrid2

синтаксический разбор предложения

2 года назад

Предмет: Английский язык, автор: degger95

Put the verbs in brackets into the gerund.

1 He gave up (gamble).

2 Try to avoid (make) him angry.

3 Stop (argue) and start (work).

4 The children prefer (watch) TV to (read).

5 I am against (make) any complaints.

6 It's no use (cry) over spilt milk. {proverb)

7 I suggest (hold) another meeting next week.

8 He finished (speak) and sat down.

9 He was fined for (drive) without lights.

10 It is difficult to get used to (eat) with chopsticks.

11 if you can't turn the key try (put) some oil in the lock.

12 He lost no time in (get) down to work.

13 You can't make an omelette without (break) eggs. (proverb)

14 We are looking forward to (read) your new book.

15 They escaped by (slide) down ropes made of blankets.

16 They don't allow (smoke) in here.
17 He is thinking of (leave) his job and (go) to America.

18 After (read) this article you will give up (smoke).

19 If you put your money into that business you risk (lose) every penny.

20 Imagine (live) with someone who never stops (talk).

21 Is there anything here worth (buy)?

22 He was accused of (leak) classified information to the press.

23 You'd better consult your lawyer before (decide) to buy the property.

24 I don't enjoy (go) to the dentist.

25 Would you mind (put) your pet snake somewhere else?

26 The hostages were rescued without a shot (be) fired.

27 By (work) day and night he succeeded in (finish) the job in time.

28 He has a scheme for (make) grass grow in winter.

29 I don't feel like (work); what about (go) to a disco instead?
30 Would you mind (write) your name and address on the back of the cheque?

31 If a thing is worth (do) at all it is worth (do) well. (proverb)

32 I hate (borrow) money.

33 He was furious at (be) mistaken for an escaped convict.

34 After (talk) for ten minutes I succeeded in (convince) him that there was no danger.

35 I remember (read) a review of that book and (think) I'd like to get.

36 As a result of (listen) at keyholes he learnt many facts which he no hesitation in (use)

to his own advantage.

2 года назад

Предмет: Русский язык, автор: mrnosok41

Составте кроссворд для слова тараз

2 года назад

Предмет: История, автор: tomiris76

Как звали французский протестантов с 16 века

8 лет назад

Предмет: Математика, автор: natalyashvetsova68

56÷8-1 56÷(8-1) Помогите пожалуйста последние просто что осталось сделать

8 лет назад