I just got my tests back from a lab and I would like to convert 6.5 mmol/dl of ammonia to micrograms per dl
can to help me out?
Please check the units again. I believe there may be some confusion between millimoles and micromoles and/or between liters and deciliters.
The basic conversion between grams and moles requires knowing the molecular weight, which is also the molar mass. For ammonia, NH3, it is 17.03 g/mol. The rest is a matter of prefix manipulation.
If 6.5 mmol/dL were correct (I Believe it is NOT!!), it would convert as follows
6.5 mmol/dL x 17.03 g/mol = 110.7 mg/dL = 110700 µg/dL
This is seriously outside the normal range. In addition, based on the JAMA medical conversions page link posted in resources, the normal "International" way of expressing ammonia is µmol/L (micromoles per liter).
IF we assume those are the units, the conversion would proceed as
6.5 µmol/L x 17.03 g/mol x 1L/10 dL = 11.07 µg/dL
Both numbers should be considered unreliable until you have sorted out the units.