I am doing a chemistry titration with ascorbic acid and iodine to determine the percentage of ascorbic acid in a regular vitamin C tablet.
I have calculated the average title to be 11.42mL and have worked out the amount in mole of iodine be 0.0571. As it is a one to one ratio the amount in mole of ascorbic acid in a 10.00mL aliquot is also 0.0571. It asks us to:
a. Calculate the amount of ascorbic acid present in the 500.0mL volumetric flask
b. calculate the amount of ascorbic acid present in the Vit. C tablet.
C. Calculate the mass of ascorbic acid in the tablet.

Please help. 

oh and.... The mass of the original tablet was 1.082g.