What is Atomic mass?
- the mass of and atom of a chemical element expressed in atomic mass units
- mass of 1 mole of atoms
What is a dozen?
- 6.02 x 10^23 molecules of oxygen is a mole of oxygen
What is a case?
What is a gross?
- a dozen dozen- used for bigger numbers = 144
What is a mole?
- the number of particles
- base unit of amount of substance
- used to measure physical quantity
- extremely large quantity
How many planet Earths are needed to have a mole of people?
- planet = 6x10^9
- mole = 6.02 x 10^23
- ? = 6.02 x 10^23/6 x 10^9
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