Relative Mass: expressed by comparing it mathematically to the mass of another object.
- Hydrogen was used first as the standard; now Carbon is the standard (assigned to be 12).
Atomic Mass: of 1 atom of the element
Formula Mass: of all atoms in an ionic compound
Molecular Mass: of all atoms in a covalent compound
Molar Mass: mass of each mole of each element (in g/mol); formula/molecular mass of any pure substance.
WARNING:The following video contains an extremely annoying yet catching tune.
If you are allergic to such things, or do not wish to have a song stuck in your head, leave now. :D
The Genius Avogadro:
Avogadro's Hypothesis: equal volumes of different gases at the same temperature and pressure have the same number of particles.
Avogadro's Number: 6.022 x 10 to the 23rd (particles per mole)
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