A chemist was asked to determine the molecular weight of Compound J.  They created a solution with 20 percentage w/w concentration from solid Compound J, with a density of 1.40 g/mL. From this solution, a 10 μL aliquot was taken and mixed with 190μL of reagent and water. This was then analyzed and had 5.0 e-4 M compound J. What is the concentration in molarity of the 20% w/w solution? How do you determine the molecular weight of said compound?

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