Use the following data to calculate the mass % ethanol in a 50.532 g sample.

0.1956 M K2Cr2O7 added to solution B.

31.05 mL of 0.05432 M Fe2+ needed to titrate an aliquot of solution B.

a) mmol Fe2+ added to titrate sample.

b) mmol Cr2O72- in excess in titrated sample.

c) mmol Cr2O72- in excess in solution B.

d) mmol Cr2O72- added to solution B.

e) mmol Cr2O72- reacted with C2H5OH in solution B.

f) mmol C2H5OH in solution B.

g) mmol C2H5OH in solution A.

h) mass % C2H5OH in original unknown beer sample.