What Fraction of a Water Molecule's Mass is Hydrogen?

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SUMMARY

The discussion centers on calculating the fraction of a water molecule's mass that is attributed to hydrogen. Participants clarify that the correct fraction is 2/18, not the commonly referenced 1/18. This indicates that hydrogen constitutes a larger portion of the water molecule's mass than initially assumed. The conversation emphasizes the importance of accurate mass ratios in molecular chemistry.

PREREQUISITES
  • Understanding of molecular composition and mass ratios
  • Basic knowledge of water's molecular formula (H2O)
  • Familiarity with atomic mass units (amu)
  • Concept of molar mass calculations
NEXT STEPS
  • Research the molar mass of hydrogen and oxygen in water
  • Learn about molecular weight calculations in chemistry
  • Explore the concept of mass fraction in chemical compounds
  • Study the implications of molecular mass ratios in chemical reactions
USEFUL FOR

Chemistry students, educators, and anyone interested in understanding molecular mass calculations and their applications in chemical science.

sxc656
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Hi, see attachment for questions/equations and my attempt.
I have had a go at this question but cannot get the correct answer, could someone be kind enough to point out my mistake and point me in the right direction. Cheers
(sorry for poor pic quality)
 

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Physics news on Phys.org
What fraction of the mass of each water molecule consists of hydrogen? It's not 1/18.
 
diazona said:
What fraction of the mass of each water molecule consists of hydrogen? It's not 1/18.

2/18. Thank You
 

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