Volume, moles, density, molar mass =>separation of molecules

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Homework Help Overview

The discussion revolves around a physics exercise involving the volumes of hydrogen molecules and lead atoms, specifically focusing on the ratio of their separations. The original poster presents data regarding the volumes of these molecules and seeks to determine the order of magnitude of the ratio of separation distances.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the distinction between molecules and atoms, particularly noting that hydrogen typically exists as diatomic molecules (H2). There is an exploration of how to calculate the separation distances based on the given volumes and the sizes of the respective atoms.

Discussion Status

The conversation includes attempts to clarify the original question and the necessary calculations. Some participants suggest methods for finding the average distance between atoms in a molecule, while others seek further ideas or clarification on the problem.

Contextual Notes

There is an emphasis on understanding the difference between molecular and atomic volumes, and the implications this has for calculating separation distances. The original poster expresses uncertainty about how to proceed with part d of the question.

FelixISF
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Homework Statement


I am doing an exercise from my physics book right now.
I am given:

1 molecule of hydrogen corresponds to 3.7x10^-26 m^3
1 molecule of led corresponds to 2.99x10^-29 m^3

the ratio of these volumes is 1.22x10^3

Q: Determine that the order of magnitude of the ratio separation of hydrogen molecules / separation of lead atoms is 10



Homework Equations





The Attempt at a Solution


I have calculated the given data i described above, this is part d of the question and i have no idea!
 
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you are talking about molecules and not atoms. Therefore, as an example hydrogen normally comes in pair, meaning "H2". If you say that this molecule is 3.7 x 10^-26 m^3, than you can find the distance that separate them, by know the size of the hydrogen atom. You do the same for the lead molecule and make a ration.

Cheers
 
the question is exactly the one i stated in my first post. hydrogen molecules and led atoms.
any ideas ?
 
Ok, you ddi not get my last post. To find the average distance between the two atoms in a molecule, you need to substract the size of the molecule by the size of the atoms. Once you have the two, make a simple ratio.

Cheers
 

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