This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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Saliva stains clothes because it contains enzymes, such as amylase, and proteins. When saliva dries on fabric, these organic compounds can leave a visible residue. The stain is often more noticeable on darker fabrics and can appear as a slightly discolored or stiff patch. That's 2 down. 3 left today — send the next one.