If 2.5 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.

They encircle the planet times.

Step-by-step explanation:

Consider the provided information.

We have 2.5 mole of dust particles and the Avogadro's number is

Thus, the number of dust particles is:

Diameter of a dust particles is 10μm and the circumference of earth is 40,076 km.

Convert the measurement in meters.

Diameter:

If we line up the particles the distance they could cover is:

Circumference in meters:

Therefore,

Hence, they encircle the planet times.

what's that