A grain of sand has a mass of 0.078 mg. How many grams is this? How many pounds is this? (1 kg = 2.20 lb)

Answer 1

0.078 mg x 1 g/1000 mg = .000078 g = 7.8x10^-5g

7.8x10^-5 g x 1kg/10³ g x 2.2 lbs/kg = lbs