# How many atoms or molecules are present in 1.0 mol of Au? How am I able to find the answer?

##### 1 Answer

May 11, 2015

You use the fact that *1 mole* of any substance contains exactly **Avogadro's number**.

In your case, *1 mole* of gold will have exactly

If round the answer to two sig figs, the number of sig figs in 1.0, you'll get

Here's a video which illustrates how to solve a problem converting from

video from: Noel Pauller

And here is an advanced example...

video from: Noel Pauller