Question

Which one is heavier 28g of nitrogen or 0.5 mole of carbon dioxide?

Answer 1

0.5 mole co2 means 6g
# by the formula of mole
and mass of nitrogen is 28g thus nitrogen is heavier

Answer 2

28gm nitrogen means 1 mole nitrogen.

0.5 mole CO2 means 22 gm CO2.

Hence the former is more heavier.