What prize did the man that Ernst Cohen studied under in Stockholm win in 1903?
Ernst Cohen: Ernst Julius Cohen ForMemRS (March 7, 1869 – March 6, 1944) was a Dutch Jewish chemist known for his work on the allotropy of metals. Cohen studied chemistry under Svante Arrhenius in Stockholm, Henri Moissan at Paris, and Jacobus van't Hoff at Amsterdam. Svante Arrhenius:  He received the Nobel Prize for Chemistry in 1903, becoming the first Swedish Nobel laureate, and in 1905 became director of the Nobel Institute where he remained until his death.
Nobel Prize for Chemistry