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One Litre of Water Has 6.02 × 1026 Molecules. Estimate the Size of a Molecule. - Physics

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Question

One litre of water has 6.02 × 1026 molecules.  Estimate the size of a molecule.

Solution

The size of a particle (or molecule of matter is very small. 1 litre of water has 6.02 × 1026molecules, so the volume of a particle of water is
`(10^-3"m"^3)/(6.0 × 10^26)` = 1.6 × `10^-30 "m" ^3`.
Thus the diameter of a water molecule is nearly 1.27 × 10−9 metre.

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One Litre of Water Has 6.02 × 1026 Molecules. Estimate the Size of a Molecule. Concept: Concept of Matter and And Composition.
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