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.
You cannot associate weight with volume without knowing the density. If you find this out. Density is mass/volume
70 grams of water is 70 ml
One liter of water weighs exactly one kilogram. (This only true of water, oil, for example, weighs less.) There are 1000 ml (milliliters) in one liter, so one milliliter weighs one gram (not milligram!) and one gram is 1000 milligrams; therefore one milliliter is 1000 milligrams. There are then 0.07 milliliters in 70 milligrams.
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.
There are 1000 milligrams in one gram. Therefore, 70 milligrams is equal to 70/1000 = 0.07 grams.
This cannot be sensibly answered. Milliliters (mL or ml) is a measure of volume, milligrams is a measure of weight or mass.
12.5mg
This cannot be sensibly answered. A milliliter (mL or ml) is a measure of volume, grams and milligrams are measures of weight or mass.
That completely depends on the density of the substance in the 1.2 ml. If the 1.2 ml is empty, then there are no milligrams in it at all.
60
1050
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.
80 mg
That is approximately 4.819 ml.