Respuesta :

mathmate
Number of moles of solute contained in a solution of molarity M and volume V litres is
MV.
Here 
M=0.85, V=250/1000=0.25L
number of moles of solute = 0.85*0.25=0.4125 mol

Explanation:

Molarity is defined as the number of moles of solute present in liter of solution.

Mathematically,            Molarity =[tex]\frac{no. of moles}{Volume in liter}[/tex]

The given data is as follows.

     V = 250.0 ml = 0.25 L,             M = 0.85 M

Therefore, calculate the no. of moles as follows.

             No. of moles = Molarity × Volume

                                   = 0.85 M × 0.25 L

                                    = 0.2125 mol

Thus, we can conclude that number of moles present in given solution is 0.2125 mol.

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