2. how many pencils are in a dozen pencils?
3. write two forms of the conversion factor that will convert a dozen to number of
objects and number of objects to dozen.
4. using the appropriate conversion factor in #2, convert 3.75 dozen eggs to number of
eggs.
5. using the appropriate conversion factor in #2, convert 248 eggs into dozens of eggs.
6. similarly, the mole (mol) is a unit for counting objects. it is especially useful for
counting tiny objects like atoms, molecules, ions, and formula-units.