The average atomic mass of Sn is 118.71 g/mol
the percentage of heaviest Sn is 5.80%
the given mass of Sn is 82g
The total moles of Sn will be = mass / atomic mass = 82/118.71=0.691
Total atoms of Sn in 82g = [tex]6.023X10^{23}X0.691=4.16X10^{23}[/tex]
the percentage of heaviest Sn is 5.80%
So the total atoms of [tex]Sn^{124}[/tex] = 5.80% X [tex]4.16X10^{23}[/tex]
Total atoms of [tex]Sn^{124}[/tex]=[tex]2.41X10^{22}[/tex] atoms
the mass of [tex]Sn^{124}[/tex] will be = [tex]\frac{2.41X10^{22}X124}{6.023X10^{23}}=4.96g[/tex]
