## ashna 3 years ago Calculate the volume occupied (a) 16 g of O2. (b) 1.5 mole of N2. (c) 6.02 * 10^20 molecules.

1. waterineyes

Volume occupied?? Level of difficultly increasing for me with each your question.. Ha ha ha..

2. ashna

:P .. so we'll both study together !

3. waterineyes

1 mole of 02 = 22.4 L

4. waterineyes

Would we use this concept here ??

5. ashna

okay .. is this like one mole = 6.023810^23 molecules . mole of an atom or compound = 22.4 L ?

6. ashna

lol .. you asking me ?

7. waterineyes

No I am not asking.. Ha ha ha..

8. ashna

then ?

9. waterineyes

Use this: 1 mole of 02 = 22.4 L 32g = 22.4 find for 16 g..

10. waterineyes

Again 16g is half of 32g remember..

11. ashna

okay .. so 22.4 * 16 / 32 = 358.4/32 = 11.2 L correct ?

12. ashna

@waterineyes

13. waterineyes

Yep..

14. ashna

okay :)

15. waterineyes

Do the same for b part..

16. ashna

okay !

17. waterineyes

Do not convert that into grams..

18. ashna

|dw:1345182838119:dw|

19. waterineyes

Well Done...

20. ashna

:D

21. waterineyes

I think you can do for third one also..

22. ashna

let me try !

23. waterineyes

24. ashna

|dw:1345183076192:dw||dw:1345183267780:dw|

25. ashna

my hand writing is not so worse actually !

26. ashna

@waterineyes checking time :P

27. waterineyes

Then give me that. Ha ha ha..

28. ashna

what ? .. the hand writing ?

29. ashna

30. waterineyes

Small mistake can you find out ?? Give me that checking time..

31. ashna

oh .. take it :)

32. waterineyes

Can you find your mistake?? Look for very last step you did ..

33. ashna

no .. :/

34. ashna

its not the whole divided huh ?

35. ashna

you better say :)

36. waterineyes

You did the steps correctly. But there is mistake in solving part..

37. waterineyes

$\frac{22.4}{1000} = ??$

38. ashna

0.0224

39. ashna

is'nt it 22.4 / 100 ?

40. waterineyes

|dw:1345183883219:dw|

41. ashna

wow .. am scared !

42. waterineyes

$\large \frac{10^{20}}{10^{23}} = ??$

43. ashna

okay .. 1000

44. waterineyes

Be careful: $\large \frac{x^a}{x^b} = x^{a-b}$

45. waterineyes

It is not 1000 but 1/1000..

46. ashna

okay !

47. ashna

thanks :D

48. waterineyes

Welcome dear..