How many moles do #8.1xx10^18# calcium atoms represent?

1 Answer
anor277
Jan 30, 2016

Approx. #1/100000"th"# of a mole.

Explanation:

In #1# #mol# of particles there are #6.022# #xx# #10^23# individual particles. So we just divide the quoted number by this, Avogadro's number, to get an answer in mol.

#(8.1xx10^18" calcium atoms")/(6.022xx10^23 " calcium atoms"*mol^-1)# #=# #??# #mol#

What is the mass of this number of calcium atoms?

Related questions
See all questions in The Mole
Impact of this question
2082 views around the world
You can reuse this answer
Creative Commons License