0.25 mol of solute is dissolved to make 4 dm³ of solution. What is the molarity?

Answer and explanation

Correct answer: B. 0.062 mol/dm³

  1. Step 1: Molarity = moles ÷ volume in dm³. Step 2. 0.25 ÷ 4 = 0.062 mol/dm³. Answer: 0.062 mol/dm³. Why not the others: 1 mol/dm³ is what you get if you multiply moles by volume. 16 mol/dm³ is what you get if you invert the ratio. 4.25 mol/dm³ is what you get if you add the numbers.

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