Did you cash savings bonds you got as a kid? Ever buy a child a U.S. savings bond? It could be time to nudge 30-somethings or 40-somethings to see if they cashed their bonds. Currently, there are about 47 million unredeemed matured savings bonds worth $16.1 billion.
There are 12 boxes of Girl Scout cookies in each case.
This number is known as Avogadro's number. Compare this to: There are 6 bottles in one six-pack, 12 eggs in one dozen, 12 dozen eggs in one gross (144) etc. They are just numbers. Note: A mole is a useful quantity, because the mass of 1 mole of a substance will have the same 'grams' as the atomic mass.