URL: https://media.cheggcdn.com/study/b30/b303f3cd-949c-4f88-af21-35e55baf8122/ScreenShot2025-09-21at3.22.20PM.png
URL2: https://www.chegg.com/homework-help/questions-and-answers/student-using-column-chromatography-separate-mixture-benzophenone-vanillin-using-1-1-penta-q253492365
