What is Atomic Mass? Total mass of protons, neutrons, and electrons in a single (motionless) atom. Mass of 1 mole of atoms.
What is a dozen? 12 of something
What is a case? 24
What is a gross? 12 x 12 = 144. It is equal to a dozen dozen. 144
What is a mole? An amount of subtance that contains the same number of elementary units as there are atoms in exactly 12 g of carbon-12. - Book p. 160 (6.02 x 10^23)?
How many planet earth's are needed to have a mole of people? 3 planets (6 billion people on the planet)
1 mole = 6.02x10^23
6 billion people (1 earth) = 6 x 10^9
6 trillion people 6 x 10^14
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