converting mg to mmol

Questions and answers on how to convert things from one unit or system to another


converting mg to mmol

Postby Terri » Wed Mar 23, 2005 1:23 am

I was hoping someone would be albe to help me in trying to convert mg to mmol for a dietary assignment. I need to convert 4732mg of potassium to mmol and 3819mg of sodium to mmol.

Thanks for your Help!!
Posts: 1
Joined: Wed Mar 23, 2005 1:18 am

Postby Guest » Wed Mar 23, 2005 2:05 am

To do this, you need to know what a mole is and how to determine the molar mass of a substance. This page gives a good but brief introduction:

Then for any given substance, you need it's chemical formula and you need a periodic table (Google -- seberal good ones on the web) to determine the atomic "weights" (masses really) that need to be added to determine the molar mass. This will be the mass (in grams) of 1 mole of the substance (the same numeric relationship will exist between milligrams and millimoles, or between micrograms and micromoles).

For your specific question, 1 mole Na = 22.99 g
and 1 mole K = 39.10 g

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