A mole of doughnuts would cover the entire earth to a depth of 8 km.

Question

Can you please show me how to calculate something like this.

Answer 1

Avogadro's number is the number of (whatevers) in a mole of those and Avogadro's number is 6.022 x 10²³.

That means a mole of doughnuts is 6.022 x 10²³ doughnuts. That would be:

602,200,000,000,000,000,000,000 doughnuts