What volume of oxygen forms when 300mL of water vapour decomposes into oxygen and hydrogen?
2 H2O ---> 2 H2 + O2
every 2 mols of H2Ogas gives one mol of O2gas
300/2 = 150mL
if T and P are not changed
every 2 mols of H2Ogas gives one mol of O2gas
300/2 = 150mL
if T and P are not changed