You cannot associate weight with volume without knowing the density. If you find this out. Density is mass/volume
Milligrams and milliliters are two different measures, milligrams measure mass and milliliters measure volume and you can not convert one to the other.
Stronger is not the word you are looking for. It is bigger or larger. However, 5 milligrams is much smaller than 300 milligrams.
Milligrams and milliliters measure different things (milligrams measure mass and milliliters measure volume), so there is no universal conversion factor. For example, 300 mg of air takes up about 250 ml, whereas 300 mg of water takes up only 0.3 ml. To get an answer you need to specify what substance you are measuring, or, if the substance is in solution, you need to specify the concentration of the solution.
There are 1000 micrograms in a milligram. Therefore 300 micrograms is 0.3 milligrams.
Does not convert; milligrams (mg) and grams (g) are measures of weight or mass and mL (milliliters) is a measure of volume.
This is not a valid conversion. Milliliters (mL or ml) and liters (L) are measures of volume. Grams (g), kilograms (kg) and milligrams (mg) are measures of weight or mass.
There are 1000000 milligrams in a kilogram. Therefore 300 milligrams will be 0.0003 kilograms.
300 milliliters is 10.14 fluid ounces.
300 milliliters is 10.14 fluid ounces.
This is not a valid comparison; milligrams (mg) is a measure of weight or mass while milliliters (mL or ml) measure volume.
300 milliliters = 0.3 liters
This is not a valid conversion; milligrams (mg) and grams (g) are measures of weight or mass and mL (milliliters) is a measure of volume.