Question: how many atoms are in 2 mol of neon?
Answer: 11.2 L of fluorine (F2 molecules) contains 0.500 mol of F2 molecules at STP. 22.4 L of neon contains 6.02 × 1023 atoms of Ne at STP. Therefore volume = 2.00 mol × 22.4 L mol–1 = 44.8 L.