A mixture of oxygen and hydrogen is examined by passing it over hot copper oxide and through a drying tube. Hydrogen reduces the CuO to metallic Cu. Oxygen then reoxidizes the copper back to CuO. We know that 100 cm3 of the mixture measured at 25oC and 750 mm yields 84.5 cm3 of dry oxygen measured at 25oC and 750mm after passage over CuO as well as the drying agent. Explain what is the original composition of the mixture? State balanced chemical equation for the reactions