Question

Convert 4.90*10^31 atoms of nickel to moles of nickel

Answer 1

1 mole of any substance is approximately 6.022*10^23 atoms (Avogadro's number)

So

(4.90*10^31 atoms) * (1 mole / 6.022*10^23 atoms) = 8.14*10^7 moles