How many moles of tungsten atoms are in 4.8 x10^25?

79.7 mol.

Explanation:

It is known that every 1.0 mole of compound or element contains Avogadro's number (6.022 x 10²³) of molecules or atoms.

Using cross multiplication:

1.0 mole of tungsten contains → 6.022 x 10²³ atoms.

? mole of tungsten contains → 4.8 x 10²⁵ atoms.

∴ The no. of moles of tungsten contains (4.8 x 10²⁵ atoms) = (1.0 mol) (4.8 x 10²⁵ atoms) / (6.022 x 10²³ atoms) = 79.7 mol.