Multiple choice Which of the following has the largest number of molecules? 36 g of H2O 44 g of CO2 43 g of CH3OH 54 g of N2O5 64 g of SO2 Reveal answer Fill a bubble to check yourself A Correct answer Explanation Correct answer. Among given options, 36 g of H2O has highest number of molecules. 34 g of H2O = 2 moles of H2O = 2 x 6.022 x 1023 molecules of H2O