The amount of caffeine contained in 150 mL of a reasonably strong cup of Starbucks coffee is about 110 mg. What is the concentration of caffeine in the cup of coffee, expressed as a percentage of weight per volume?
A Chemistry 20 student is provided with two sodium carbonate solutions for a laboratory activity. Solution A has a concentration of 3.48 x 103 ppm and Solution B has a concentration of 0.46% W/V. Which solution is more concentrated?