Compound X is optically inactive and has the formulaC 16H 16Br 2. On treatment with strong base, X gives hydrocarbon Y, C 16H 14. Compound Y absorbs 2 equivalents of hydrogen when reduced over a palladium catalyst and reacts with ozone to give two fragments. One fragment Z, is an aldehyde with formula C 7H 6O. The other fragment is glyoxal, (CHO) 2. The structure of Y is: Ph Ph

Estimated volume of crucible 25.0 mL  measured volume of crucible 23.0 mL  percent error of estimate (% error=accepted value-experimental value/accepted value ) volume in (use measured volume of crucibleto answer for the ):  kL cL