What is the rate of the reaction

When analyzing results of a Hill reaction, you find the following results

Time (min) Absorbance DPIP ox DPIPred
0 0.9
10 0.7

A standard curve of absorbance as a function of oxidized DPIP concentration in ug/ml gives the following equation for the trend line: Y=.5X. The reaction volume was 7ml.

a) Fill in the amount of oxidized DPIPox and DPIP reduced in the above table.

b) What is the rate of the reaction over the 10 minutes depicted in the above table (DPIP=268g/mol)

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