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You cannot.

A milligram is a measure of mass. A millilitre is a measure of volume. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid.

Any conversion factor will depend on the density of the solution and there is no information about either the solute or the solvent for that to be calculated.

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Q: How do you convert 0.250 mg of a solution to ml?
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How many mg per ml in a twenty percent solution?

A 20% solution would mean 20 g of the substance in 100 ml of solution. To convert this to mg per ml, you would have 20,000 mg of the substance in 100 ml of solution. Therefore, in a 20% solution, there would be 200 mg per ml.


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There would be 946 mg (2 mg/ml x 473 ml) of active ingredient in 473 ml of the solution. To convert milligrams to grams, divide by 1000, so 946 mg is equal to 0.946 grams in 473 ml of the solution.


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To calculate the concentration of the sucrose solution, you would divide the amount of sucrose (125 mg) by the total volume of the solution (500 ml) and then convert the units as needed: Concentration of sucrose solution = 125 mg / 500 ml = 0.25 mg/ml = 0.25 g/L


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How much 25 mg by ml solution can you make by diluting 120 ml of a 100 mg by ml solution?

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To calculate the total amount of sodium bicarbonate in the 20ml polyfuser, you first need to convert the percentage concentration to mg/ml. 8.4% of sodium bicarbonate means 8.4g of NaHCO3 in 100ml of solution. Convert 8.4g to mg (8.4g * 1000 = 8400mg), then divide by 100ml to get 84mg/ml.


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You have 30 ml of 1% lidocaine on the shelf. The order calls for 40 mg . How many mL do you need to use?

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If 2.5 kg of a drug was dissolved and brought to a volume of 1 liter what is the concentration of the solution in milligrams of Drug A per milliter of solution?

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