Depends, 50 nanograms of what? Those units measure different things: mass, versus volume. The general relationship is:
mass = volume x density
You would have to know the density of a specific substance, then do your calculations.
0.05 kilograms.
0.05 milligram = 50 000 nanogram
A very small measure of weight.
50 feet equals 0.01524 km
It is supposed to be 50 nanograms per ml in a standard test
50 yards equals 150 feet.
50 centimeters=0.5 meters50cm equals 0.5 meter.
50 cc equals 50 ml.
2.5mL equals 50 drops.
50 inches = 127 centimeters
50 mg = 0.050 g
There are 2,500 weeks in 50 years.