How many atoms are in 20.6g of N2O4 gas at STP?

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Discussion Overview

The discussion revolves around calculating the number of atoms in 20.6g of N2O4 gas at standard temperature and pressure (STP). Participants explore the relationship between molecules and atoms in this context, as well as the necessary calculations to arrive at the answer.

Discussion Character

  • Homework-related
  • Mathematical reasoning

Main Points Raised

  • One participant questions how to determine the number of atoms from the number of molecules, suggesting a conversion based on the ideal gas law and Avogadro's number.
  • Another participant points out that one molecule of N2O4 contains 6 atoms, implying that the total number of atoms can be calculated by multiplying the number of molecules by 6.
  • The initial poster expresses confusion about why the number of atoms wouldn't simply equal the number of molecules in their calculations.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the calculation method, as there is a mix of understanding regarding the relationship between molecules and atoms.

Contextual Notes

The discussion does not clarify the assumptions made in the calculations, such as the ideal gas behavior or the specific conditions at STP. There are also unresolved steps in the mathematical reasoning presented.

Who May Find This Useful

This discussion may be useful for students learning about gas laws, stoichiometry, and the relationship between molecules and atoms in chemical compounds.

fish
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Gas is N2O4.
fill in the chart. I've got all but atoms.

how do I get the # of atoms?
why wouldn't it be the same as molecules:
1 mol/22.4L * 6.02x10^23 molecules/1 mol * 5.02L
= 1.35x10^23 molecules
molecules of are: 1.35x10^23
why couldn't I just replace the word 'molecules' with atoms
ie, 6.02x10^23 atoms in the above conversion and get
the same answer?

molecules: 1.35x10^23
Atoms: ? how do you set this up?
Mass: 20.6g
Vol at STP: 5.02L

answer from book is 8.10x10^23 atoms
 
Chemistry news on Phys.org
1 molecule of N2O4 contains 6 atoms (assume that all of the bonds are covalent).

6 * Your Answer = Their Answer
 
cool :smile:
 
Happy to help. :smile:
 

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