Question

If a sample contains 5.850 x 10^22 formula units (particles) of iron (III) chloride, what is its mass, in grams?

Particles --> mol FeCl3 --> Mass of FeCl3

5.850x10^22 x 1mol FeCl3/6.022x10^23 x 162.2g/1mol FeCl3
is this correct??

Answer 1

Please clarify something for me. By formula units (particles), do you mean atoms?

Answer 2

yeah i think thats what the question means

Answer 3

Fe = 55.85 Cl= 3 x 35.45
FeCl3=162.2

Answer 4

to find how many particles are in FeCl3 I would multiply 162.2 by 6.022 x 10^23

Answer 5

what? you divide 5.850x10^22 by 4?

Answer 6

yes

Answer 7

If you follow that process. You should get the right answer.

Answer 8

so you dont even use 6.022 x 10^23

Answer 9

https://www.google.ca/search?q=how+to+convert+atoms+to+moles&espv=2&biw=1360&bih=663&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjU_7z0qM7LAhUJ_mMKHTaxBpgQ_AUIBygC#imgrc=4gi46TfXvLjQjM%3A

Answer 10

Yes you use avorgado's number. This means you divide your total particles by that number to get moles. Then moles x molar mass. There you go. You had the right answer. Sorry if I confused you.