calculate the mass in g of 2.0x10^24 atoms of Fe

Answer 1

Hello Gehan!

First lets look at the periodic table. What would be one mole of Fe be?

Fe= 55.845g = 1 mole Fe

Next, we start with what we are given

2.0*10^24 atoms Fe

So how do we get from atoms to grams?

We can use Avogadros # or 6.022*10^23 atoms = 1 mole

So the calculation would look like this:

2.0*10^24 atoms Fe x 1 mol Fe/ 6.022^23 atoms x 55.845 g Fe / 1mol Fe = 185.47 g of Fe

Please let me know if you need anything else or need me to explain it more to you!!