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SCIENCE

The Claim

Water has the chemical formula H2O.

Verified by Lenz ·

The Short Version

Authoritative chemistry sources uniformly identify water’s chemical formula as H2O. The claim matches the standard molecular composition of water: two hydrogen atoms bonded to one oxygen atom. Objections based on liquid-water behavior or hydrogen bonding do not change that formula.

Caveats

  • H2O is the standard molecular formula for ordinary water; bulk properties like hydrogen bonding do not alter the formula.
  • Trace ionization in water into H3O+ and OH− does not make the formula incorrect; it reflects a small equilibrium process in bulk water.
  • Lower-quality sources such as YouTube videos or uncited AI text are unnecessary here because government and scientific references already establish the claim clearly.

The Receipts

  1. Water | H2O | CID 962 - PubChem - NIH

    PubChem

  2. Water

    NIST Chemistry WebBook

  3. 9.1: H₂O - Simple Formula, Remarkable Molecule

    LibreTexts Chemistry

  4. Why is water so essential for life?

    American Chemical Society

  5. Chemical Formulas

    Lumen Learning

  6. What is the Chemical Formula of Water? H₂O Explained | SWM

    Smart Water Magazine

  7. Water and life

    Khan Academy

  8. Discovery of the Composition of Water | History | Research Starters

    EBSCO

  9. Water as a solid, liquid, and gas

    Khan Academy

  10. How to Write the Chemical Formula for Water - YouTube

    YouTube

+ 1 more sources — see the full list on Lenz

Filed Under

water

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