The term 'Determine the Amount of' can be solved by two crossword solutions: ASSAY (5 letters) and ASSESS (6 letters). ASSAY is a noun that refers to an analysis of a substance, usually done in a laboratory, to determine its components or composition. ASSESS is a verb that means to evaluate or estimate the value, importance, or quality of something. Both words are related to the idea of determining the amount of something, either through analysis or evaluation.