How many moles of solute are in 200 cm³ of a 0.1 mol/l solution?
Answer and explanation
Correct answer: C. 0.02
- Step 1: Convert: 200 cm³ = 0.2 litres.
- Step 2: Moles = concentration × volume = 0.1 × 0.2 = 0.02.
Answer
0.02.
Why not the others: 20: the volume was not converted to litres. 0.5: the concentration was divided by 0.2. 2: the decimal point was misplaced.
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