Question

Find the mass of 10 moles of sodium sulphite (Na2 SO3).(Na  23u ; S  32 u ; O  16u )(c) (i) Calculate the number of molecules in 8g of oxygen gas.(ii) Convert 22g of CO2 into moles( C  12u , O  16u , No  6.022  1023 per mole

Answer 1

If the given mass of ten moles of sodium sulphite is eight and the mass of the oxygen atom is sixteen, then in order to calculate the number of molecules, if one is to divide the mass with the mass of the oxygen atom, the answer would be half a molecule.