What is the mass of a single #""^20Ne# atom?

1 Answer
anor277
Mar 21, 2017

We divide the #"molar mass"# by #"Avogadro's number........."#

Explanation:

And thus #"atomic mass"# #=# #"Molar mass"/"Avogadro's number"#

#=(20*g*mol^-1)/N_A=(20*g*cancel(mol^-1))/(6.022xx10^23*cancel(mol^-1))#

#=3.32xx10^-23*g#.................

Note the dimensional consistency of the quotient; i.e. we wanted an answer with units of mass, and we got one......

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