Finding number density and average distance between molecules

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Homework Help Overview

The problem involves calculating the average distance between gas molecules given specific conditions of temperature, pressure, and the amount of gas in moles. The subject area pertains to gas laws and molecular density.

Discussion Character

  • Exploratory, Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • Participants discuss the calculation of number density based on the number of moles and the volume occupied by the gas. There is some confusion regarding the correct method to calculate the number of particles and how to derive the number density from it.

Discussion Status

The discussion is ongoing with participants exploring different methods to calculate the number density. Some guidance has been provided regarding the relevance of pressure and temperature to this specific calculation, indicating a productive direction in the conversation.

Contextual Notes

Participants are navigating the implications of using the ideal gas law and the definitions of moles and particles, with some assumptions about the necessity of certain variables being questioned.

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Homework Statement



At 0.0° C and 1.00 atm, 0.95 mol of a gas occupies a volume of 0.0213 m3.

(b) Estimate the average distance between the gas molecules.
 
Last edited:
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Do you know that 1 mole means 6.02 x 10^23 particles?
You have 0.95 moles so can you see how to calculate the 'number density' i.e the number of particles per m^3
 
so divide the 6.02e23 by .95?
 
Not divide by 0.95. You have 0.95 OF 1 mole
 
ohh multiply them and then do the same thing as I did before.
 
see what you get
 
6.02e23*.95*1*272/.0213= 7.3e27
 
you are being blinded by equations ! You have the number of molecules correct and you have the volume... that is all you need to get the 'number density'
The pressure and temperature are not needed for this part.
 

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