Can Molecular Distances Determine the Volume of Objects?

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Discussion Overview

The discussion revolves around the possibility of calculating the volume of objects, such as rocks, based on the distances between their constituent molecules. Participants explore theoretical approaches and practical implications of this concept.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant inquires whether molecular distances can be used to determine the volume of shapes, suggesting a connection between molecular structure and macroscopic volume.
  • Another participant asserts that if the number of atoms or molecules is known, distances can indeed be calculated, but notes that multiple arrangements may lead to different volume calculations.
  • A follow-up post reiterates the importance of knowing the number of molecules and introduces Avogadro's number as a potential factor in volume calculations.
  • One participant provides a hypothetical example involving a simple cubic lattice structure, explaining how to calculate the volume per atom based on a specific separation distance and the total number of atoms.

Areas of Agreement / Disagreement

Participants express varying views on the feasibility of using molecular distances to calculate volume, with some agreeing on the theoretical basis while others highlight the complexities and potential for multiple outcomes.

Contextual Notes

Limitations include the assumption of specific atomic arrangements and the dependence on the number of atoms, which may not apply universally across different materials.

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TL;DR
Is there any calculation for distance between molecules to find out the volume of shapes around us?
Summary: Is there any calculation for distance between molecules to find out the volume of shapes around us?

Molecules give shape to everything around us,so I want to know is there anyway to find out volume of shape(like rock)by the distance between molecules?
 
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If you know the number of atoms or molecules: Sure. Distances between them can be calculated. Sometimes there are multiple possible arrangements, then there will be multiple possible answers.
 
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mfb said:
If you know the number of atoms or molecules: Sure. Distances between them can be calculated. Sometimes there are multiple possible arrangements, then there will be multiple possible answers.
Ok if we consider avagadro number 6.02×10²³ for amount of our molecules then how we can calculate it?
 
No, the number of atoms in your object.

Toy example: Let's say your atoms form a simple cubic lattice with 0.4 nm separation. The volume per atom is just that length cubed. If you have 1018 atoms then you have 1018 times that volume. As an example they might form a cube with a side length of 1 million atoms, or 0.4 mm in each direction.
 

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