What is the concentration, in millimolar, of a 1 mg/ml solution of nacl (molecular weight = 58 da)?

Explanation:

Relation between molarity and molar mass is as follows.

             Molarity =

It is given that mass is 1 mg/ml which is also equal to g.

Molecular mass = 58 Da = 58 g/mol

Volume = 1 ml

Therefore, calculate molarity as follows.

         Molarity =

                       =  

                       = 0.0172 molar

It is known that 1 molar equals 1000 millimolar.

So,               0.0172 molar =

                                          = 17.2 millimolar

Thus, we can conclude that the concentration of given solution is 17.2 millimolar.