A nano mole is 1 billionth of a mole. Decimal wise it looks like this .000 000 001. If your chemical compound had a molecular weigh of 1628.25, you would multiple 1628 X .000 000 001 to determine how many grams you would dissolve in a liter to make a 1 nM solution. The term mmol is use for millimole or one thousandth (10-3) of a mole. Usually these solution are made by serial dilution since is very difficult to weigh the small amounts required to make the solutions.
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