Apure silver ring contains 5.15×1022 silver atoms. how many moles of silver atoms does it contain? express the number of moles to two significant figures.

1 mole 6.02x10²³atoms
(moles) 5.15x10²² atoms

moles silver = ( 5.15x10²²) * 1 / 6.02x10²³ = 

moles silver = ( 5.15x10²²)  / 6.02x10²³ =

=> 0.085 moles of silver