What is the volume needed to make 4.2m solution using 6.5 mol nacl?

Molarity is given as,

                             Molarity  =  Moles / Volume of Solution    (1)

Given Data:
                   Molarity  =  4.2 mol.dm⁻³

                   Moles     =  6.5 mol

To Find:
                  Volume  =  ?

Solution:
              Solving Eq. 1 for Volume,

                              Volume  =  Moles ÷ Molarity
Putting Values,
                              Volume  =  6.5 mol ÷ 4.2 mol.dm⁻³ \

                              Volume  =  1.54 dm⁻³                    ∴ 1 dm³  =  1 L

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