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In a police forensics lab, you examine a package that may contain heroin. However, you find...

In a police forensics lab, you examine a package that may contain heroin. However, you find the white powder is not pure heroin but a mixture of heroin (C21H23O5N) and lactose (C12H22O11). To determine the amount of heroin in the mixture, you dissolve 1.00 g of the white powdery mixture in water in a 100.0-mL volumetric flask. You find that the solution has an osmotic pressure of 536 mm Hg at 25 °C. What is the composition of the mixture?

Mass of C21H23O5N = g

Mass of C12H22O11= g

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