What is the strength (expressed as a ratio) of a 30 milliliter solution that contains 300 milligrams of sodium chloride?
1. 300:30
2. 3:30
3. 10:1
4. 1:100
4
Global Rationale: 300 mg = 0.3 g; 0.3/30 = 0.01 = 1:100.
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