Given :
Volume of water, V = 20.1 mL.
Molarity of MnO₄⁻ , M = 0.020 M.
To Find :
The number of moles of potassium permanganate solution.
Solution :
We know, molarity is given by :
[tex]M = \dfrac{\text{Number of moles}}{\text{Volume in liters}}\\\\0.020 =\dfrac{n}{20.1}\\\\n = 0.020\times 20.1\\\\n = 0.402\ moles[/tex]
Therefore, number of moles of potassium permanganate solution is 0.402 moles.
