🤓 Based on our data, we think this question is relevant for Professor Judd's class at PBCC.
The units of parts per million (ppm) and parts per billion (ppb) are commonly used by environmental chemists. In general, 1 ppm means 1 part of solute for every 106 parts of solution. Mathematically, by mass:
ppm = μg solute / g solution = mg solute / kg solution
In the case of very dilute aqueous solutions, a concentration of 1.0 ppm is equal to 1.0 μg of solute per 1.0 mL, which equals 1.0 g solution. Parts per billion is defined in a similar fashion. Calculate the molarity of each of the following aqueous
a. 5.0 ppb Hg in H2O