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?

YC SUS: Eric Migicovsky hosts founder office hours

I got sued by Apple.

View All

Warren Buffett Explains the 7 Rules Investors Must Follow in 2023

Warren Buffett, the king of value investing, has definitely built a cult-like following over the years, and well, he’s undoubtedly my investing idol too. What I find so interesting about his investment strategy, the one that’s made him 20% returns per yea…

Aliens under the Ice – Life on Rogue Planets

Rogue planets are planets that travel through the universe alone. They inhabit the dark and vast space between the stars. Drifting alone through eternal darkness, no light warms their surfaces, and they’re exposed to the freezing cold of outer space. They…

What The U.S. Need to Do?

And you’ve studied how empires rise and how empires fall over the past several hundred years. You’ve said that generally speaking, empires collapsed for three main reasons. The first is debt, the second is internal conflict—so you know, polarity within a …

Why Sharks Attack Cage Divers | Shark Attack Files