In a volumetric determination of an analyte A, the data obtained and their standard deviations are as follows:

From the data, find the coefficient of variation of the final result for the % A that is obtained by using the equation that follows and assuming there is no uncertainty in the equivalent mass.

% A = titrant volume × equivalent mass × 100%/sample mass

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Initial buret reading0.19 mL 0.02 mL Final buret reading 9.26 mL 0.03 mL Sample mass 45.0 mg0.2 mg