In chemistry, a mole is a very large number of things. Typically, the things are atoms, molecules, or other compounds. A mole of atoms or molecules is an amount that you can see. For example, one mole of water molecules is about 18 mL or a little more than a tablespoon.
In this video, I not only explain what a mole is, but I also explain how to convert from grams to moles and moles to grams. In addition, I demonstrate how to calculate the molar mass of a compound and how to do mole-mass and mass-mole conversions for molecules and other compounds.