If one mole of marbles were spread over the surface of earth, how thick would that layer of marbles be?

Question

I am not sure how to solve a question like this.

Answer 1

First you want to find the circumference of Earth, then you will take that number and divide by Avogadro's number. This value will be the length each marble must be to cover the Earth. Then since that number will be the diameter of the marble that should also be the height. Hope this helps explain how to solve these types of problems!