How many zinc atoms are contained in 354 g of zinc?

Question

How many zinc atoms are contained in 354 g of zinc?!

Answer 1

Hello Emma,

First have many grams of Zinc are in 1 mole of Zinc?

1 mole Zn= 65.38grams Zn

So we start with

354g Zn x 1 mol Zn/ 65.38 g Zn = 5.41 moles Zn

So now we have # of moles how do we get to # of atoms?

We use our fabulous avogadros #!!!! 6.022*10^23 atoms = 1 mole of anything

5.41 moles Zn * 6.022*10^23 atoms Zn / 1 mole Zn=

3.26 * 10^24 atoms of Zn

Please let me know if you need anything else or more help explaining this problem!!