A 2 percent (w/v) solution contains 2 g per 100 mL. How much solute is in 250 mL?
Answer and explanation
Correct answer: B. 5 g
- Step 1: 250 mL is 2.5 times 100 mL. Step 2. 2 g x 2.5 = 5 g. Answer: 5 g. Why not the others: these values do not scale correctly.
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