A plaque remaining from the Big Apple Night Club at West 135th Street and Seventh Avenue in Harlem.

Above, a 1934 plaque from the Big Apple Night Club at West 135th Street and Seventh Avenue in Harlem. Discarded as trash in 2006.

Recent entries:
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“If I had a dollar for every time someone over 40 told me my generation sucks…” (joke) (5/24)
Entry forthcoming—B.P. (5/24)
“Don’t be yourself. Be a pizza. Everyone loves pizza” (5/24)
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Entry from March 09, 2016
“How many guacs are in a bowl of guacamole?"/"Avocado’s number.”

"Avogadro’s number” sounds like “avocado’s number,” prompting the math joke:

Q: How many guacs are in a bowl of guacamole?
A: Avocado’s number.

The pun was cite in the newsgroup net.jokes in 1985. “How many guacs are there in a mole?” was cited in 2003.

Wikipedia: Amedeo Avogadro
Lorenzo Romano Amedeo Carlo Avogadro di Quaregna e di Cerreto, Count of Quaregna and Cerreto (9 August 1776, Turin, Piedmont-Sardinia – 9 July 1856), was an Italian scientist, most noted for his contribution to molecular theory now known as Avogadro’s law, which says equal volumes of gases under the same conditions of temperature and pressure will contain equal numbers of molecules. In tribute to him, the number of elementary entities (atoms, molecules, ions or other particles) in 1 mole of a substance, 6.02214179(30)×1023, is known as the Avogadro constant, one of the seven SI base units and represented by NA.

Wikipedia: Avogadro constant
In chemistry and physics, the Avogadro constant is the number of constituent particles, usually atoms or molecules, that are contained in the amount of substance given by one mole. Thus, it is the proportionality factor that relates the molar mass of a compound to the mass of a sample. Avogadro’s constant, often designated with the symbol NA or L, has the value 6.022140857(74)×1023 mol−1 in the International System of Units (SI).

Previous definitions of chemical quantity involved Avogadro’s number, a historical term closely related to the Avogadro constant, but defined differently: Avogadro’s number was initially defined by Jean Baptiste Perrin as the number of atoms in one gram-molecule of atomic hydrogen, meaning one gram of hydrogen. This number is also known as Loschmidt constant in German literature. The constant was later redefined as the number of atoms in 12 grams of the isotope carbon-12 (12C), and still later generalized to relate amounts of a substance to their molecular weight.

Google Groups: net.jokes
Jon Frankle
How many GUACs in a guacamole?
Avocado’s number.

Google Books
Introductory Chemistry
By Charles H. Corwin
Englewood Cliffs, NJ: Prentice Hall
Pg. 111:
Did you guess how many avocados are in a guacamole? The answer is avocado’s number!

Google Groups: alt.fan.dragons
Science Joke of the Day - 18 May 2002
MistWing SilverTail
Q: How many guacs are in a bowl of guacamole?
A: Avocados number.

Google Groups: alt.music.tool
Schroedinger’s “Cat?”
Shanan Capes
How many guacs are there in a mole?
avacado’s number

Chemical & Engineering News
Volume 83 Issue 1 | p. 56 | Newscripts
Issue Date: January 3, 2005
Iconic chemical dictionary, Chemistry puns, Jokes for chemists
Q. How many atoms are in guacamole?
A. Avocado’s number

Iodine Gestalt
RT @doctorlinguist: augh! RT @josiah: Q: How many guacs are in one mole of guacamole?A: Avocado’s Number
2:04 PM - 22 Oct 2009

Q: How many guacs are in a bowl of guacamole? A: Avocados number.
8:11 PM - 24 Sep 2010

Google Books
A Neutron Walks Into a Bar…
Random Facts about Our Universe and Everything in It

By Science140
Hachette Ireland
Pg. ?:
How many moles are in a guacamole?
Avocado’s number.

Trader Joe’s
Avocado’s Number Guacamole
April 30, 2012 - Fearlessly Archived - Still a fun read, price & availability may have changed.
This Guacamole’s Got Your Number
Trader José’s Avocado’s Number Guacamole has a mind-bogglingly large number of avocados – at least five in every 16 ounce package. Lorenzo Avogadro, the math & physics whiz, came up with a mind-bogglingly large number, too (6.02214199 x 1023 if you’re curious). Make sense now? Okay, humor us; it’s perfectly logical. Because the number 5 is definitely similar to the number of protons in a gram of pure proteins, right?

My Town Tutors
Jokes For Teachers: Chemistry Jokes For Teachers
Posted on November 22, 2015 by mmolloy
3. How much does Avogadro exaggerate?… He makes mountains out of mole hills.
4. Why is it bad to tell mole jokes?… It’s mole-itically incorrect
5. What did Avogadro get when he mixed ice cream, chocolate syrup, and milk together?… A chocolate Moletd
6. What’s the mole’s favorite college football team?… The Florida State Semimoles
7. What kind of fruit did Avogadro eat in the summer?… Watermolens
8. How many guacs are in a bowl of guacamole?… Avocado’s number!

Posted by Barry Popik
New York CityFood/Drink • Wednesday, March 09, 2016 • Permalink