We’re being asked to determine the molarity of 4 ppm dissolved O2. Let’s first define ppm and ppb.
• 1 ppm means 1 part of solute for every 106 parts of the solution
in terms of solutions:
• 1 ppb means 1 part of solute for every 109 parts of the solution
Fish need at least 4 ppm dissolved O2 for survival.
What is this concentration in mol/L?
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