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Data has been collected to show that at a given wavelength in a 1 cm pathlength cell, Beer's Law for the absorbance of Co2+ is linear. If a 0.135 M solution of Co2+ has an absorbance of 0.350, what is the concentration of a solution with an absorbance of 0.430. Please help!!

The following questions deal with copper(II) sulfate. a. In part B of this experiment, you will use copper(II) sulfate pentahydrate. What is the molar mass of this compound? b. How much of this compound must be weighed to make 250.0 mL of a 0.15 M solution? c. How...