Question

If you have 4.2x10^28 Zn (zinc) atoms, how many moles of zinc do you have?

Answer 1

We can find the number of moles of a compound based on their number of atoms using Avogadro's number which says that there are 6.022 x 10^(23) atoms in 1 mol.

`4.2\cdot10^(28)atoms\text{ Zn}\cdot\frac{1\text{ mol Zn}}{6.022\cdot10^(23)atoms\text{ Zn}}=69744.27\text{ moles Zn.}`

The answer is that there are 69744.27 moles of zinc in 4.2 x 10^(28) atoms of zinc.