Предмет: Химия, автор: wpff5b7td5

Допоможіть будь ласка

Приложения:

Ответы

Автор ответа: danildiachenko23
1

Ответ:

Объяснение:

1. n = N / Na, Na = 6,02 * 10^23 (молекул);

n = N / Na, отже N = n * Na = 1,5 моль * 6,02 * 10^23 молекул =

= 9,03 * 10^23 молекул.

2. n = V / Vm; Vm = 22,4 (л/моль);

n = V / Vm, отже V = n * Vm = 2 моль * 22,4 л/моль = 44,8 л.

3. n = m / M; M(H2O) = Mr(H2O) = 18 г/моль.

n = m / M = 3,6 г / 18 г/моль = 0,2 моль.

4. D(CO2) за O2 = Mr(CO2) / Mr(O2) = 44 г/моль / 32 г/моль = 1,375.

5. n = m / M (NH3) = 34 г / 17 г/моль = 2 моль.

n = N / Na, отже N = n * Na = 2 моль * 6,02 * 10^23 молекул =

= 12,04 молекул

6. n = V / Vm = 4,48л / 22,4 л/моль = 0,2 моль.

n = m / M, отже m = n * M = 0,2 моль * 34 г/моль = 6,8 г.

7. n заліза = m заліза / M заліза = 28г / 56 = 0,5 моль.

n заліза = n водню.

n водню = N / Na, отже N = n водню * Na = 0,5 моль * 6,02 * 10^23 молекул = 3,01 * 10^23 молекул.

Відміть відповідь найкращою, будь ласка :)))


wpff5b7td5: Дякую
Похожие вопросы
Предмет: Английский язык, автор: andry12662
ПОМОГИТЕ!СДЕЛАЙТЕ ПОЖАЛУЙСТА БЕЗ ЕДИНОЙ ОШИБКИ ЗАВИСИТ ОТ ЭТОГО ОЦЕНКА!!!!ПРОШУУУУУУУУУУУ!!


A. Complete sentences with correct Tense. Use Present Simple, Present Continuous, Present Perfect, Present Perfect Continuous, Past Simple, Past Continuous, or Future Simple

e.g.) He _visited_(visit) London last year. 7) She __________ (not/receive) visa yet.

1) When I came home, he ________ (read). 8) He ______ (be) in the room five minutes ago.

2) The storm _____ already ________ (not/stop). 9) We ______________ (not/sleep) at the moment.

3) He ________ (start) to do his homework at 5

o’clock. 10) I ___________ (buy) a pair of gloves every autumn.

4) It’s 10 o’clock, he ___ still ______ (do) his

homework. 11) We haven’t got any milk. I ________ (go) to the shop tomorrow.

5) My mother just _________ (buy) a bike for me. 12) Yesterday we _________ (go) to the cinema.

6) The moon _______ (be) the most bright thing at

the night sky. 13) We ______________ (sit) here for an hour. Let’s go home.

B. Choose the correct item. Remember different ways to say about actions in future.

e.g.) Be careful! We will crash / are crashing. 16) Our train is coming / comes at 3 o’clock.

14) I am having / will have lunch at the restaurant

this afternoon. Join me! 17) Billy think, he is drinking / will drink much water.

15) It’s sunny! It is / will be warm in the evening. 18) We are going to rest / rest at this weekend.

C. Fill in the gaps with correct form of adjective.

· short · good · cold · fat · interesting · difficult

e.g.) January is the _coldest_ month of the year. 21) It was the _________ cat I’ve ever seen.

19) Harry is very clever. He is the ________

student in his school. 22) The Volga is ____________ than the Mississipi.

20) Reading books is ____________ than watching

films. 23) It is one of the ______________ tasks in the world..

D. Match the beginning and the end of the phrase.

e.g.) If the weather is fine a) if you phone me.

24) If you heat ice, b) I will leave you alone.

25) I will tell you something, c) it melts.

26) They will be surprised, d) the moon shines.

27) If it is night, e) if you come to the party.

28) If you are busy, f) we will play outside.
Предмет: Алгебра, автор: fnrfuidigsdffdsbsdfg