An engagement ring contains #3.97 * 10^-2# moles of gold. How many individual gold atoms are in this ring?
If you had 30 eggs would you be able to tell me how many dozen eggs you had? I think you would.
You have quoted a quantity of gold atoms in MOLES. Now it is a fact that if you have a MOLE of something (gold atoms, for instance, or even eggs) you have
So the number of gold atoms:
Please note the use of dimensions in this answer. I required a number, and got a dimensionless number. Capisce?