Some Basic Concepts of Chemistry

A hydrocarbon containing C and H has 92.3%C. When 39g of hydrocarbon was completely burnt in O2,x moles of water and y moles of CO2 were formed. x moles of water is sufficient to liberate 0.75 moles of H2 with Na metal. What is the weight (in g) of oxygen consumed?
(C=12u:H=1u)