How much does a water molecule weigh?
2.99 × 10⁻²⁶ kgWhich one: 2.99 × 10⁻²⁶ kg, H₂O
A water molecule has a mass of about 2.99 × 10⁻²⁶ kg.
Atomic masses converted to kilograms, for the very smallest puzzles.
How heavy is that?
- A water molecule weighs about as much as 18 hydrogen atoms.
About the same weight
More atoms
- Helium atom 6.65 × 10⁻²⁷ kg
- Carbon atom 1.99 × 10⁻²⁶ kg
- Oxygen atom 2.66 × 10⁻²⁶ kg
- Iron atom 9.27 × 10⁻²⁶ kg
- Gold atom 3.27 × 10⁻²⁵ kg
- Uranium atom 3.95 × 10⁻²⁵ kg
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