26.8 moles of argon contain how many atoms?

1 Answer
Aug 9, 2016

Answer:

#26.8xxN_A#, where #N_A="Avogadro's Number"#.

Explanation:

#N_A="Avogadro's Number"= 6.022xx10^23*mol^-1#.

Thus, #"number of Ar atoms"# #=# #6.022xx10^23*cancel(mol^-1)xx26.8cancel(mol)# #=# #??#