A typical dust particle has a diameter of about 10.0 µm. If 1.0 mol of dust particles were laid end to end along the equator, how many times would they encircle the planet? The circumference of the Earth at the equator is 40,076 km.
Diameter of the dust particle=10µm=1010-6m
Distance covered by 1 mol(6.0231023) particles will be=6.02310231010-6m