How do you calculate millimoles?

Answer 1

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.

Answer 2

A 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

Answer 3

Well 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.

Answer 4

A 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.

Answer 5

To calculate millimoles, you need to know the number of moles and then convert that value to millimoles by multiplying by 1000. The formula is: millimoles = moles x 1000. This conversion helps in expressing the quantity of a substance in terms of millimoles, which is a common unit for measuring the amount of substances in chemistry.

Answer 6

take the quantity in milligrams then divided by molecular mass gives you the millimoles.....

Answer 7

There are 1000 millimoles in a mole. Therefore, you have to multiply by 1000 to convert moles to millimoles.

Answer 8

The 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.

Answer 9

convert 100mg pyrazine to millimole