Question

CAN SOMEONE HELP ME PLEASE?

Answer 1

What's your question?(:

Answer 2

1. A sample of gold (Au) has a mass of 35.12 g.
a. Calculate the number of moles of gold (Au) in the sample and record in
Table 1. Show your work.
this is Stoichiometry i dont understand anything from this i watched the live lesson but it didnt help as much and my teacher doesnt really reply because to me so im like behind on 2 other portfolios that i told her to let me skip over until im ready for it but its almost the ending of this semester so i have to do it now

Answer 3

I presume you go to Connections? I go there as well!
To solve the problem, we just need to convert it into moles!
So it would look like this!
\[35.12g AU * (1mol/197g)=0.18 mol AU\]

Do you need to convert that into atoms?
if so- multiply by using Avogardo's number:

\[0.18 mol * (6.022*10^23 atoms/1mol) = 1.08 * 10^23 atoms\]

and that's 10^23rd power, not 10^2 and 3 atoms.

Answer 4

@365-days-of-april thank you alot.
also where did you get 197g from?

Answer 5

oh nevermind i see it

Answer 6

It's the molar mass of Gold. (:
Technically, it's 196.97... but you can round lol

Answer 7

Thanks for the medal too!

Answer 8

you're welcome