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# How many milligrams of an active ingredient are needed to make 400 ml of a 1 in 1000 solution?

Updated: 9/20/2023

Wiki User

13y ago

It is not clear whether the strength of the solution is given in terms of mass/mass or volume/volume (or mass/volume). Without that information, it is not possile to answer the question.

Depending on which one you may need the density of the active ingredient or of the solvent to convert between mass and volume of that component.

Wiki User

13y ago

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Q: How many milligrams of an active ingredient are needed to make 400 ml of a 1 in 1000 solution?
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