A 3.65-g petroleum specimen was decomposed by wet ashing and subsequently diluted to 500 mL in a volumetric flask. Cobalt was determined by treating 25.00-mL aliquots of this diluted solution as follows:
![2345_d5cac8c9-2b87-4fbf-a5dd-0bfb3c56fd6b.png](https://secure.tutorsglobe.com/CMSImages/2345_d5cac8c9-2b87-4fbf-a5dd-0bfb3c56fd6b.png)
Assume that the Co(II)-ligand chelate obeys Beer's law, and calculate the percentage of cobalt in the original sampl