What is the number of representative particles in 3.0 mol #Sn#?

1 Answer
Mar 13, 2016

Answer:

There are #3xxN_A" tin atoms"# in #3.0# #mol# of tin metal, where #N_A# is Avogadro's number, #6.022xx10^23# #mol^-1#.

Explanation:

If I simply wrote #3xxN_A#, I think that would be an acceptable answer. Of course, you'll have to do the multiplication.

So why do we use the number #N_A#?

#N_A# has the property that #N_A# #""^1H# atoms have a mass of #1.00# #g#. #N_A# #""^12C# atoms have a mass of #12.00# #g#. And #N_A# #Sn# atoms has a mass of #118.7# #g#. What is the mass of your quantity?