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A solute of molar mass 50 g/mol forms an aqueous solution with molarity 9 and molality 18. Find the density of the solution.

1. 0.95 g/cc
2. 1 g/cc
3. 1.05 g/cc
4. 2 g/cc

Correct answer: 0.95 g/cc

Solution

Per litre the solution contains 450 g solute and 500 g water, a total of 950 g, so the density is 0.95 g/cc.

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