Homeopathy and Avogadro's Number

 
Avogadro's Number, or it's more modern equivalent, Avogadro's Constant, is 6.022 × 10²³ mol^-1.

There's a new website called "Homeopathy: There's nothing in it" that explains why Avogadro's Number is important in understanding why homeopathy is a fraud.

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[Hat Tip: Phil Plait]