How many moles are present in 6.023×1022 molecules of CO2?
How many moles of molecules and atoms of sulphur are present in 0.1 mole of S8?
How many grams of : (a) Al are present in 0.2 mole of it, (b) HCl are present in 0.1 mole of it? (c) H2O are present in 0.2 mole of it, (d) CO2 is present in 0.1 mole of it?