# Mole Concept question

• Chemistry

## 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 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!!

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

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

I thought of starting by this but i am not able to think of the next step.

Borek
Mentor
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?

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

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

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
Mentor
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

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....:uhh: