This cannot be sensibly answered. A milliliter (mL or ml) is a measure of volume, grams (g), kilograms (kg) and milligrams (mg) are measures of weight or mass.
if water, 250 Mg = 250 megagrams (i'm not sure that's what you mean) 250 Mg (megagrams) = 250,000,000 ml 250 mg (milligram) = 0.25 ml 250 ug (micrograms) = 0.00025 ml
250 ml = 8.45350 fl.oz
It looks like the 3.5 ml may be extraneous information. If 1 ml yields 250 mg, then you need 400/250 = 1.6 ml, to get 400 mg.
mg measure mass or weight. ml measure volume.
how many teaspoons in 250 ML dry
Twenty 250 mg tablets are needed to make 50 mL if the concentration is to be 500 mg per 5 mL.
0,4 ml
That would depend upon the density, because mg is a unit of mass, while ml is a unit of volume.
Two
is equal to 1cc
250 milliliters is equal to 8.5 ounces.
.25 or 1/4