The concentration of iodine in sea water is 60. parts per billion by mass. If one assumes that the iodine exists in the form of iodide anions, what is the molarity of iodide in sea water? (The density of sea water is 1.025 g/mL.)

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To find the molarity, convert parts per billion (ppb) to grams per liter using the density of seawater, then convert grams to moles using the molar mass of iodide (I-), which is approximately 127 g/mol. This calculation results in a molarity of approximately 4.8*10^¯⁷ M.

The Concentration of Iodine in Sea Water Is 60