Question

A pure silver ring contains 2.10×1022 silver atoms. part a how many moles of silver atoms does it contain?

Answer 1

The number of moles of silver atoms it contain =0.0349 moles

calculation

by use of Avogadro's law constant

that is 1 mole= 6.02 x10^23 atoms

               ?      = 2.10 x10 ^22 atoms

=(2.10 x10^22 atoms x 1 moles)/(6.02 x10^23 atoms) =0.0349 moles