Question

Dark roasted coffee contains increased amounts of N-methylpyridinium or NMP, a ringed compound which is not present in green, unroasted coffee beans. This compound seems to decrease the stomach acid production normally associated with drinking coffee. In coffee made from dark roasted coffee, the concentration of NMP is 30.3 mg/L. How many milligrams of NMP would you consume if you drank 2.00 large cups of dark roasted coffee? (1 coffee cup contains 10.0 fluid ounces of liquid.)

Answer 1

Mass NMP consumed = 17.9 mg

Explanation

Volume of coffee = 2.00 cups

Volume of coffee = 2.00 cups * (10.0 fl. oz. / 1 cup)

Volume of coffee = 20.0 fl. oz

Volume of coffee = 20.0 fl. oz * (1 L / 33.814 fl. oz.)

Volume of coffee = 0.591471 L

Mass NMP consumed = (Concentration NMP) * (Volume of coffee)

Mass NMP consumed = (30.3 mg/L) * (0.591471 L)

Mass NMP consumed = 17.9 mg