How many atoms of sodium (Na) are in
5.4 mol of sodium?
Answer in units of atoms.

1023 atoms

1023 atomsThen, multiply the number of moles of Na by the conversion factor 6.02214179×1023 atoms Na/ 1 mol Na, with 6.02214179×1023 atoms being the number of atoms in one mole of Na (Avogadro's constant), which then allows the cancelation of moles, leaving the number of atoms of Na.

the answers would be

the first one and the second one