Alcohol levels in blood can be determined by a redox titration with potassium dichromate according to the balanced equation:
C2H5OH(aq) +2Cr2O7-2(aq) 16H+(aq)--> 2CO2(g) + 4Cr3+(aq) +11H2O(l)
What is the blood alcohol level in mass percent is 8.76 mL of0.04988 M K2Cr2O7 is required for titration of a 10.0002 g sample of blood?