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Millimoles are a unit of measurement based of mole, which measures the amount of substance in something that has an equal number of atoms and elementary entities. Millimoles are calculated by multiplying the amount of moles by 1,000.
Wiki User
∙ 9y ago
Wiki User
∙ 14y agoA mole is Avogadro's Number (6.022 x 1023) of molecules, not a unit of weight.
A shorthand conversion is to multiply the number of millimoles by the molecular weight of the substance. This leaves out the (mutually-cancelling) 1000x conversions between moles and millimoles, and grams and milligrams.
Short example for water: 10 millimoles x 18g/mol (M.W. of water) = 180 mg
Long example for water: 10mmol x (1mol/1000 mmol) x 18 g/mol x 1000 mg/g = 180 mg
Wiki User
∙ 12y agoWell a micromole is 1millionth of a mole. A milligram is 1millionth of a kilogram. Sadly, we usually work in grams when considering moles since (A): It is convenient given most reagents in labs are used in gram quanities, or thereabouts. (B): No element weights less than 1 gram per mol (>_> unless you had pure 1H...nah) and no element weights near a Kg per mol.
Anyhow, we know that mols = mass/mr. Which means mols = grams/molecular weight.
So find what you're converting and count up it's molecular weight. Then we can rearrange to make it:
grams = mols x molecular weight. So we know our equation, now. So now all you have to do is make sure your magnitudes are correct. The easiest way to do this and think about this is as it's outlined at the top of the answer. Just convert it all into grams since that's what this equation wants.
1micromole = millionth of a mol = 1x10^-6 (so 5 micrograms = 5x10^-6)
So in the above example, if you had 5 micromoles...don't put 5micromoles into the equation. Put 5x10^-6 moles. Same number, better units.
Then put in the molecular weight of your sample, get the product. This will now be in grams.
How to convert it into grams? Well say we put in 5x10^-6 moles into the equation and your molecular weight is 100.
100 x 5x10^-6 = 5x10^-4grams
1000milligrams = 1. So times 5x10^-4 by 1000 and you get 0.5 grams.
This kind of thing takes practice and most people have their own set method to work them out quickly with no mistakes. Just practice.
Wiki User
∙ 12y agoA millimole is one thousandth of a mole. So multiply moles by 1000 to get millimoles. A one molar solution has one mole of solute per liter of solution. A one millimolar solution has one millimole of solute per liter of solution.
Wiki User
∙ 14y agotake the quantity in milligrams then divided by molecular mass gives you the millimoles.....
Wiki User
∙ 10y agoThere are 1000 millimoles in a mole. Therefore, you have to multiply by 1000 to convert moles to millimoles.
Wiki User
∙ 10y agoThe formula is number of moles is mass/ molecular mass. This is also true of no millimoles = milligrams / molecular mass. So You have to multiply by the molecular mass.
Wiki User
∙ 11y agoconvert 100mg pyrazine to millimole
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What is the difference between millimoles and millimolar?
Millimole is 1000th of a mole which is 10^-3
How do you calculate the number of moles in 56 millimole Na-OH?
Milli means one thousandth. So there are 1000 millimoles in a mole. Therefore 56/1000 gives you 0.056 moles.
How do you prepare 10mM ferric chloride solution?
You obtain 10 millimoles of ferric chloride and dissolve it in a liter of water.
How much is 100 millimoles?
Milli means 1/1000 (compare millimetres), so it's 1/10 mole
When is the unit millimoles per litre used?
Millimole per litre is a unit for small concentrations; sometimes used for pharmaceutical solutions.
What is the conversion of 1250 millimoles to moles?
There are 1000 millimoles in a mole. So you need to divide by 1000 here. 1250 millimoles / 1000 is 1.25 moles.
What is the difference between millimoles and millimolar?
Millimole is 1000th of a mole which is 10^-3
Convert 125 grams of calcium to moles?
For this you need the atomic mass of Ca. Take the number of grams and divide it by the atomic mass. Multiply by one mole for units to cancel.125 grams Ca / (40.1 grams) = 3.12 moles Ca
What is 1 millimoles to milliequivalent of potassium?
25.5meq
How do you calculate the number of moles in 56 millimole Na-OH?
Milli means one thousandth. So there are 1000 millimoles in a mole. Therefore 56/1000 gives you 0.056 moles.
How do you convert 2.55 millimoles to moles?
You need to divide by 1000 here. This is because there are 1000 millimoles in a mole. 2.55/1000 gives you 0.00255 moles.
What is the mass in kilograms of 3.25 millimoles of water?
The molecular weight of water is 18g/mol. There are 0.00325 moles in 3.25 millimoles. 0.00325*18 is 0.0585 grams. This is 0.0000585 kilograms.
What is the concentration of NaCl in cytosol?
Approx. 12 millimoles/L.
What is the mass of 100 millimoles of caffenine C8H10N4O2?
100 millimoles is 0.1 moles. To convert moles to grams, you need to multiply by the molecular weight, in this case, 194.22g/mol. 0.1*194.22 is 19.422 grams.
Why divide glucose mgs by 180 for millimoles?
Because the formula for calculating moles is dividing grams by the molecular weight. The molecular weight for glucose is 180. grams to moles is also the same as milligrams to millimoles.
How many millimoles are in 12g of sodium hydroxide?
The molecular weight of sodium hydroxide is 40g/mol. To get the amount of moles, you have to divide the weight by molecular mass. 12g / 40 is 0.3 moles. This is 300 millimoles.
How many micromoles of Ammonia present in 25ml of 6mM Ammonium Sulphate?
Assuming that "mM" means "millimolar", the solution specified contains 6 millimoles of ammonium sulphate per liter. Therefore, 25 ml of the solution contains 6(25/1000) = 0.15 millimoles. By definition, there are 1000 micromoles per millimole. Therefore, 0.15 millimoles = 150 micromoles.
