The blood alcohol levels can be measured by the REDOX titration with the potassium dichromate according to the following unbalanced reaction (in the acidic solution):
C2H5OH (aq) + Cr2O7 2-(aq) yielding CO2(g) + Cr3+(aq)
Determine the blood alcohol level in mass percent if the17.52mL of0.1106M K2Cr2O7 is required to titrate a 39.87g sample of blood?