Mole Concept question

  • Chemistry
  • Thread starter Saitama
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  • #1
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Homework Statement


Hello Everyone!!
I am solving a lots and lots of questions on Mole Concept but i am getting stuck in this:-

Calculate the volume occupied by 5.25g of nitrogen at 26[itex]\circ[/itex] C and 74.2 cm of pressure.

The Attempt at a Solution


I actually dont know from where should i start. I have done questions when the conditions are at STP but i have never done a question like this.

Thanks!! :smile:
 

Answers and Replies

  • #2
start by the fact that one mole of any gas at 273K and 1 bar pressure occupies 22.7L volume
 
  • #3
3,816
92
start by the fact that one mole of any gas at 273K and 1 bar pressure occupies 22.7L volume

Thanks for your reply Piyush!!
I thought of starting by this but i am not able to think of the next step. :confused:
 
  • #4
Borek
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This is direct application of ideal gas equation, PV=nRT. The only problem is with units of the pressure - is it cm (which doesn't make sense to me), or cm Hg?
 
  • #5
3,816
92
This is direct application of ideal gas equation, PV=nRT. The only problem is with units of the pressure - is it cm (which doesn't make sense to me), or cm Hg?

So what should be the unit? :confused:
 
  • #6
Borek
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cm Hg most likely. Close relative of mmHg, or torr.
 
  • #7
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cm Hg most likely. Close relative of mmHg, or torr.

Thanks for your help Borek!! :smile:

I am having many questions to solve in mole concept (almost a full book). If i get any doubts, can i post them in this thread one by one? :smile:
 
  • #8
Borek
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In general you should start a new thread with each one. But there is a catch - if you start several at once, that's wrong as well.

Let's hope you will be able to deal with most of the questions on your own :wink:
 
  • #9
3,816
92
In general you should start a new thread with each one. But there is a catch - if you start several at once, that's wrong as well.

Let's hope you will be able to deal with most of the questions on your own :wink:

Yes i will try to solve them by my own :wink:
But they are really tough....:uhh:
 

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