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You take a solution of compound M that has a concentration of 90 mg/L. Compound M...

You take a solution of compound M that has a concentration of 90 mg/L. Compound M has a molecular weight of 25 g/mol. It is first diluted by a factor of 15, and then by a factor of 20. What is the concentration of the final diluted solution in % (w/v)?

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