How Can We Know If The t-butyl Chloride Has Been Successfully Synthesized In A Distillation Lab?

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How can we know if the t-butyl chloride has been successfully synthesized in a distillation lab? At what stages can we tell whether or not it was successful?
The data in the table below were obtained using Flame Atomic Absorption Spectroscopy (FAAS) for the trace metal analysis of Nickel (Ni) in sample X to plot the calibration curve with concentration of Nickel in the blank solution and five calibration solutions. Solution Absorbance Blank solution 0.001 10 ppm of Nickel solution 0.142 20 ppm of Nickel solution 0.299 30 ppm of Nickel solution 0.446 40 ppm of Nickel solution 0.600 50 ppm of Nickel solution 0.729 (a) Find the least-squares equation of the calibration curve using the least-squares method and the value of R2 (12 marks) (b) If an unknown solution, sample X, was measured using FAAS with three replicates by student Timothy, and found to receive absorbance values of 0.356, 0.358, 0.363, determine the unknown concentration of Nickel in sample X. (3 marks) (e) Another student, Angela, repeated sample X measurement but now with seven replicates, with absorbance values of 0.359, 0.354, 0.356, 0.364, 0.361, 0.360, 0.373, determine whether the questionable data (0.373) should be retained at the 90% confident level (6 marks) (d) Assume that there is no systematic error in data sets obtained from both Timothy and Angela, comment on whether it is worth to repeat 7 times, at the 95% confident level. (Hint: you are required to do statistical analysis to draw your conclusion.) 
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