The word mole comes from the Latin word moles, which means “heap” or “pile.” Like the word dozen, a mole has a numerical value (6.022 × 10²³) attached to it. Explain where this number comes from and how the ability to count individual atoms would help you to determine its value. Then, if you could count a million atoms per second, calculate how long in years it would take you to count a mole of atoms.