Conversion factors between some redundant units and the SI

1 Conversion factors between some redundant units and the SI 

Quantity SI unit/symbol Old unit/symbol Multiply number in old unit by this factor for equivalent in SI unit Multiply number in SI unit by this factor for equivalent in old unit  

The SI unit for mass is the kilogram (kg) rather than the gram (g) this is unusual because the base unit has a prefix applied. 

You should use the mole (mol, i.e. Avogadro s constant, see Table 9.4) to express very large numbers. The mole gives the number of atoms in the atomic mass, a convenient constant. 

The SI unit of concentration, molm , is not convenient for general laboratory work. It is equivalent to the non-SI term millimolar (mM) while molar (M) becomes kmolm. If the solvent is not specified, then it is assumed to be water (see Chapter 6). 

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