You need a very sensitive scale to measure 4mg reliably and consistently.
If possible you could make a homogeneous mixture with some inert ingredient and get a larger sample to weigh, making errors less pronounced. I.e. you could mix 1 gram into 999 grams of inert stuff, then measure 400 milligrams of the mixture to get 4 mg of the desired substance.
(dilution in a liquid is another means of accomplishing the same thing).
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It is some bizarre measure with units [L]-4[T]2
This cannot be sensibly answered. Milliliters (mL) is a measure of volume, mg is a measure of weight or mass.
This cannot be sensibly answered. A milliliter (mL or ml) is a measure of volume, mg is a measure of weight or mass.
You misunderstand!!! 'mg' is a measure of 'mass' 'ml' is a measure of liquid voilume. You need to know the density of the substance to abkle to compare.
No; mg is a measure of mass, milliliter is a measure of volume.