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Problem- Naproxen is a commercially important anti-inflammatory agent. A solution of 1.138g of naproxen in 25.00 g of benzene has an osmotic pressure of 4.00 atm at 20oC. The solution volume is 29.75mL. Calculate the molar mass of naproxen, assuming it does not dissociate. The density of the solution equals the density of pure benzene

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