Happy Mole Day!

less than 1m read

·Nov 11, 2024

Hey everybody! Rocco T. Mole here to wish you a Happy Mole Day from all of us at Khan Academy!

Yes, moles! The chemistry concept, not the critter. Now, in case you’ve been living under a rock (like me), a mole is another name for Avogadro’s number which is (approximately) 6.022 times 10 to the 23rd. Kinda like how a “dozen” is another name for 12.

So why do we need a name for such a big number?! Well, we could write it like this: 602,214,129,000,000,000,000,000 (Thank you). But that would take a while! Moles make counting easier for chemists, particularly when talking about atoms or molecules.

So for the number of molecules in a cup of water, you could write an 8 with 24 zeros after it... OR you could just call it 13 moles of water instead! (Thank you Yuki) Isn't that easier?

Now, the moral of this story is: moles are the best! And if you want to learn more about chemistry, or anything, really, head to our website: khanacademy.org.

That's Khan as in Ghenghis, no relation; and Academy, as in academy. Happy Mole Day everyone! You can learn anything!

Are we still–we're not recording, right?

My Tenant Horror Story.

Seth Klarman's Warning for "The Everything Bubble"

View All

Inflation Just Hit a 13-Year High and Investors Are Worried

So in the past week, the Federal Reserve has had their little meeting and decided to keep interest rates exactly where they are until their next meeting. So for those that don’t know, the Fed meets eight times per year to discuss monetary policy. With in…

Stunning Photos of Sacred Water Around the World | Nat Geo Live

We went to Mexico to look at the sacred Cenotes in the Yucatan. They used to be spiritual places for the Mayans. Today we come and we seek peace and relaxation and meditation. This is a Russian Orthodox community on Epiphany day. Now, you’re probably gon…

Love and Science | Genius

[Music] No, it must be an anomaly. Tight again! I already have 20 times. It’s not an anomaly. This sample must contain a new element, a radioactive element. It would have to be hundreds, no thousands of times stronger than uranium. We must isolate it. We…

15 Ways to Create GENERATIONAL WEALTH