A 500-G Sample of a Compound Is Dissolved in Enough Water

question 56

Multiple Choice

A 5.00-g sample of a compound is dissolved in enough water to form 100.0 mL of solution. This solution has an osmotic pressure of 25 torr at 25°C. If it is assumed that each molecule of the solute dissociates into two particles (in this solvent) , what is the molar mass of this solute?

• A) 18,600 g/mol
• B) 37,200 g/mol
• C) 74,300 g/mol
• D) 1560 g/mol
• E) none of these

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