Calculate the number of atoms in a 4.58×10^3 g sample of boron.

Answer 1

Take the grams of Boron to moles of Boron and then use Avagadro's number to convert to atoms.

4580g B x 1mol B x 6.022E23 atoms B = atoms of Boron.

1 10.81g B 1 mol

Hope that helps!