Mole means “heap” or “pile” and is a unit for measuring the amount of a pure substance. It’s a chemist’s dozen. It’s a lot bigger than 12 though. It’s 6.022 x 10^23. So if you had a mole of eggs, you’d have… that huge number at the bottom of the slide. The most confusing part is this…
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Actually, that experiment is under the lesson titled, “Air Having Mass”. You can find it on the list of lessons of the left side of the screen.
So the video ends with you saying “now lets do an experiment where you can see that has mass”. Do I just click on the next lesson to see that experiment?