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 Abbreviated list of quantities, units and symbols in physical chemistry

 4.3 physical quantities: general chemistry

Physical Quantity Symbol SI Unit
number of entities N 1
amount of substance, chemical amount n mol
molar mass M kg mol-1
relative molecular mass, (molecular weight) Mr 1
relative atomic mass, (atomic weight) Ar 1
molar volume Vm m3 mol-1
mass fraction w 1
volume fraction f 1
mole fraction x, y 1
partial pressure of substance B pB Pa
number concentration C, n m-3
amount (of substance) concentration of B or concentration of B  cB, [B] mol m-3
molality m  mol kg-1
mass concentration r, g kg m-3
surface concentration G mol m-2
stoichiometric number v 1
extent of reaction x mol

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