1 mole = 106 micromoles
(Micrograms per litre)/(gram molecular weight of solute) = (micromoles per litre).
1 micro Molar means 1 micro liter per litre is equal to 0.001milliter per litre
divide by the molecular mass, (units of gram per mol)
In order to convert between milligrams and micromoles, one has to know the molar mass of the substance in question, then simply convert from grams to moles. As an example, let's assume that the measurement is that of oxygen, or O2, and that there's 10 milligrams per liter. First, divide by 1,000, to convert to grams, in this case, .01 grams. Then, divide this amount by the molar mass, which represents the number of grams in a mole. For O2, this is approximately 31.9988. This gives us a result of around .0003125 moles, or 3.125 x 10^-4. Then, we multiply by 1,000,000 to convert from moles to micromoles. The end result is approximately 312.5 micromoles in the liter.
2.5g/100ml = moles/1L First convert the ml into L. 2.5g/.100L = moles/1L Cross multiply. 25 moles/ 1L
First you divide by 1000 to convert to moles/litre. Then you find the molecular mass (add up atomic masses from the periodic table). Multiply moles per litre by the molecular mass and it is in grams per litre.
You have to know the concentration first. That will either be in grams per milliliter (or milligrams per milliliter), or it could be in moles per liter (molarity). If it's given in grams per milliliter, just multiply that number by 60 and multiply by 1000.If it's given in moles per liter, than first find how many moles in 60 mL by multiplying by 0.06, and then convert moles to grams using the molar mass of caffeine (194.19 grams per mole).See the Related Questions for how to convert moles to grams.
The formula is no. moles is mass over molecular mass. If you multiply micromole by molecular mass you get micrograms. Then you have to divide by 1000 to convert per litre to per millilitre.
In order to convert a microliter per liter to a mililiter per liter, just divide by 1,000.
129 (grams per liter) = 129,000,000 micrograms per liter.
Concentration is usually expressed in moles per liter, which is called molarity. You could also use moles per mL and other measures of volume. It is also possible to convert this to any measurement of mass/volume (such as grams per liter, milligrams per liter, etc) Molarity. which is Moles/Liter. molarity is expressed as captial m. (M) so if you have 15 M HCl(aq) it is MUCH more concentrated than 5 M HCl(aq)
Since both of them are per liter....then all you need to do is a one step conversion of moles into grams using the molar mass...essentially you are going to multiply the mol/L by the molar mass in grams of the given substance...