Which of the following have largest number of molecules?

Calculate the number of moles of each
Mass of H2O = 3.6 g
Moles of H2O = 3.6g / 18g mole−1 = 0.2 moles
Mass of C2H5OH = 4.6 g
Moles of C2H5OH = 4.6g / 46g mole−1 = 0.1 moles
Mass of CO = 2.8 g
Moles of CO = 2.8g / 28g mole−1 = 0.1 moles
Mass of N2O5 = 5.4 g
Moles of N2O5 = 5.4 g / 108 mole−1 = 0.05 moles
Greater the number of moles of a compound greater the number of molecules. So the largest number of molecules are present in the water.