There are 70 milligrams of iodine in how many milliliters of a 1:4 iodine solution?
1. 0.28 mL
2. 17.5 mL
3. 175 mL
4. 280 mL
Answer is 1. (Rationale: 0.07 g × 4 mL/1 g = 0.28 mL.)
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