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# a good trick
is not to think about concentrations but about total number of moles, that you want to keep constant. So because 1 milliliter is a 1000th of a liter, you'll have a 1000th of the number of moles.

another way is to follow the units 1uM/L=(1uM/L)*(1L/1000mL) (because there are 1000mL in a L)
(, Thu 26 Oct 2006, 19:30, archived)
# thank you!
*takes notes*
i'd just done a bunch of conversions from ug to mmol and then they threw that one in there and i totally stalled.
(, Thu 26 Oct 2006, 19:33, archived)
# Also....
Knock both units down by a factor of 1000.
i.e.

1umol in 1 L
1nmol in 1 ml
1pmol in 1 nl etc.

eventually you'll end up with femto and yoctomoles, which is almost individual molecules
(, Thu 26 Oct 2006, 19:33, archived)