Question: What is the % CaO in an unknown sample given the absorbance is 0.091 and that the original sample was prepared by diluting 0.1221 g

What is the % CaO in an unknown sample given the absorbance is 0.091 and that the original sample was prepared by diluting 0.1221 g of unknown into 1.000 L of 6M trace metal grade HCl (density of the solution = 1.000 g/mL)? No additional dilutions of this solution were done, the solution prepared above was the solution tested in the AAS.

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