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

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SUMMARY

The discussion centers on calculating the number of atoms in 20.6g of N2O4 gas at standard temperature and pressure (STP). The conversion process involves determining the number of molecules using the ideal gas law and Avogadro's number, leading to a calculation of 1.35x10^23 molecules. Since each molecule of N2O4 contains 6 atoms, the total number of atoms is calculated as 8.10x10^23. The key takeaway is that the number of atoms is not the same as the number of molecules due to the molecular composition of N2O4.

PREREQUISITES
  • Understanding of the ideal gas law
  • Familiarity with Avogadro's number (6.02x10^23)
  • Knowledge of molecular composition (specifically for N2O4)
  • Basic skills in unit conversion and dimensional analysis
NEXT STEPS
  • Learn how to apply the ideal gas law to different gases
  • Study molecular composition and its impact on atomic calculations
  • Explore the concept of STP and its significance in gas calculations
  • Investigate the relationship between moles, molecules, and atoms in chemistry
USEFUL FOR

Chemistry students, educators, and anyone interested in gas laws and molecular calculations will benefit from this discussion.

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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