How many molecules are in 10.0 moles of H2O?

1 Answer
Sep 4, 2016

Answer:

Well, in one mole of stuff there are #"Avogadro's Number, "N_A#, individual items of stuff.

Explanation:

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

#10.0*molxxN_A=10.0*cancel(mol)xx6.022xx10^23*cancel(mol^-1)#

#=# #6.022xx10^24" individual water molecules."#

Note that had you been asked #"how many eggs are in 2 dozen eggs"# I think you would have very very quickly given the answer. #N_A# is a collective number like the #"dozen"#; the only difference is that #N_A# is monumentally larger.