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Rubbing alcohol is a mixture of isopropyl alcohol (C3H7OH) and water that is 70% isopropyl alcohol by mass (D = 0.79g/mL at 20C). Express the

Rubbing alcohol is a mixture of isopropyl alcohol (C3H7OH) and water that is 70% isopropyl alcohol by mass (D = 0.79g/mL at 20⁰C). Express the concentration of rubbing alcohol in molarity and molality.

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