The number of molecules in 16.0g of oxygen is
32 g or 1 mole of O2 = 6.023×1023 So, 16 g of O2 = 6.023×1023×1632 = 3.01×1023 molecules
Calculate the weight of one molecule of oxygen. (Avogadro's number = 6 × 1023, [O] = 16)
The number of gram molecules of oxygen in 6.02*10^24 CO molecules is