If you are given #2.13 x10^24# atoms Au, how do you determine the moles in the sample and the mass of the sample?

1 Answer
anor277
Dec 4, 2016

Divide the given number by #"Avogadro's number"#, and then mulitply this number, the number of #"moles of gold"# by the #"molar mass"# of gold.

Explanation:

#"Moles of gold atom"# #=# #(2.13xx10^24" gold atoms")/(6.022xx10^23" gold atoms"*mol^-1)#

#~=# #3.5*mol#

And then we multiply this number by the molar mass of gold:

#3.5*molxx197.0*g*mol^-1# #~=# #700*g#

Today's price of gold is #$38-00" USD "g^-1#.

How much is your mass worth?

Related questions
See all questions in Unit Conversions
Impact of this question
9839 views around the world
You can reuse this answer
Creative Commons License