# Problem: In clinical applications, the unit parts per million (ppm) is used to express very small concentrations of solute, where 1 ppm is equivalent to 1 mg of solute per 1 L of solution. Calculate the concentration in parts per million for each of the following solutions. a) There are 41 µg of calcium in a total volume of 69 mL. b) There is 0.91 mg of caffeine in a total volume of 131 mL. c) There is 0.51 mg of trace particles in a total volume of 99 dL solution.

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In clinical applications, the unit parts per million (ppm) is used to express very small concentrations of solute, where 1 ppm is equivalent to 1 mg of solute per 1 L of solution. Calculate the concentration in parts per million for each of the following solutions.

a) There are 41 µg of calcium in a total volume of 69 mL.

b) There is 0.91 mg of caffeine in a total volume of 131 mL.

c) There is 0.51 mg of trace particles in a total volume of 99 dL solution.

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Based on our data, we think this problem is relevant for Professor Tyson's class at UMASS.