How many molecules in a milligram?

Answer 1

The number of millimoles in a milligram depend on the molecular weight of the substance in question. The molecular weight tells how many grams per mole a substance has, and thus how many millimoles in a milligram.

Answer 2

This depends very much on which compound you have in mind, or to be more precisely on the molecular mass of it.

Find the molar mass in grams.

Multiply by 1000 (milligrams per gram).

Take the reciprocal of that (to convert from milligrams per mole to moles per milligram).

Multiply by 6 x 1023 (molecules per mole).

That's approximately how many molecules of that substance are in a milligram.

Answer 3

The number of molecules in a milligram depends on the specific substance. To calculate this, you would need to use the formula: Number of molecules = (Mass in mg / Molecular weight) * Avogadro's number where Avogadro's number is approximately 6.022 x 10^23 molecules/mol.

Answer 4

18