Question

How many moles of `NO_2` are there in `1.81 * 10^24` molecules of `NO_2`?

Answer 1

3.00 moles

Explanation:

In finding the amount of moles there are, you first have to know what the mole is and what it represents. Avogadro's number is `6.022`x`10^23`. That number can represent anything; in chemistry it often stands for atoms or molecules. In this question it represents molecules.

`1.81`x`10^24 "molecules"` X# 1mol`/`6.022`x`10^23"molecules"`=`3.00 mol#