Final answer:
A 16-ounce cup holds 2 cups of liquid.
Step-by-step explanation:
A 16-ounce cup holds 2 cups of liquid because 1 cup is equal to 8 ounces. So, if you divide 16 ounces by 8, you get 2 cups. Therefore, the appropriate amount of 100 proof alcohol for a 16-ounce cup would be 2 cups.