Depending on the density of the material.
M=d x V.
A teaspoon has approx. 5 mL.
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1 teaspoon would contain approximately 5mg of the drug.
There are approximately 28.35 milligrams in a teaspoon. To convert 140 milligrams to teaspoons, you would divide 140 by 28.35 to get about 4.93 teaspoons.
To convert from teaspoons to mg you need to know the density of the substance being weighed and which definition of teaspoon you are using. suffice it to say that 30 mg of water is approximately 0.00609 American teaspoons To convert from teaspoons to mg you need to know the density of the substance being weighed and which definition of teaspoon you are using. suffice it to say that 30 mg of water is approximately 0.00609 American teaspoons
combination of sodium and chloride, has 2,325 milligrams (mg) of sodium
You can not equate a unit of volume (the teaspoon) with a unit of mass (the mg) because it depends on what you are measuring (its density). Another answer: The volume of a particular weight will vary depending upon the density of the item being measured. You are also looking for a very small volumetric measurement. For example, a teaspoon of water weighs approximately 5 grams or 5000 mg, so 50 mg would be about 1/100 of a teaspoon - not easily measured.