Chemistry Mole Concept Q: Volume of 5.25g Nitrogen @ 26\circ C, 74.2 cm

[Saitama]

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\circ C and 74.2 cm of pressure.

The Attempt at a Solution

I actually don't 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!

 

[piyushkumar]

start by the fact that one mole of any gas at 273K and 1 bar pressure occupies 22.7L volume

 

[Saitama]

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.

 

[Borek]

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?

 

[Saitama]

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?

 

[Borek]

cm Hg most likely. Close relative of mmHg, or torr.

 

[Saitama]

cm Hg most likely. Close relative of mmHg, or torr.

Thanks for your help Borek!

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?

 

[Borek]

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

 

[Saitama]

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

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