Question
The sterile saline solution used to rinse contact lenses can be made by dissolving 400 $\mathrm{mg}$ of NaCl in sterile water and diluting to 100 $\mathrm{mL}$ . What is the molarity of the solution?
Step 1
Since 1 gram is equal to 1000 milligrams, we have: \[400 \, \text{mg} = \frac{400}{1000} \, \text{g} = 0.4 \, \text{g}\] Show more…
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The sterile saline solution used to rinse contact lenses can be made by dissolving 400 mg of NaCl in sterile water and diluting to 100 mL. What is the molarity of the solution?
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