A mixture of hydrogen and oxygen is analyzed by passing the mixture over hot copper oxide and through a drying tube. Oxygen reoxidizes the copper formed: Cu +½ O2 à CuO and the Hydrogen reduces the CuO according to the reaction: Cu + H2àCu +H2O. One hundred cubic centimeters of the mixture measured at 250C and 750 mm Hg yields 84.5 cm3 of dry oxygen measured at the same temperature and pressure after passage over the CuO and drying agent in the tube. Calculate the original composition of the mixture?