Mass of 6.022 x 1022 molecules of CO2 is about:
4.4 g
1 mole of a substance is equal to its molecular mass expressed in terms of grams.
Gram molecular mass of CO2 = 12 + (16 Χ 2)
= 12 + 32
= 44 g
Mass of 1 mole (6.023 X 1023 molecules) of CO2 is about 44g.