Europium, atomic number 63, reacts with oxygen at room temperature.
4Eu + 3O2---> 2Eu2O3
Calculate the volume of oxygen, in cm3, required to fully react with 9.12 g of europium at room
temperature and pressure.
Answer
If answer = 1080 cm3 award 2 marks
Amount of Eu = 9.12/ 152.0 = 0.06(00) mol
Amount of O2 = 0.0600 x 3/4 = 0.045(0) mol
and
Volume of O2 = 0.0450 x 24000 = 1080 cm3
Why do you need to multiply 02 by 3/4??