6.02 x 10^23

I wish everyone a Happy Mole Day.

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Because, of course, tomorrow is Mole Day. According to the National Mole Day Foundation:
This is National Chemistry Week.
It's mole day. The mole day site is down (try it later), but you can find out about it on Wikipedia.

We celebrate all geeky holidays here on scienceblogs ;-)

But pie, yes, chocolate silk pie for me for tonight!