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Q.

A 6.50 molal solution of KOH (aqs). Has a density of 1.89g cm-3. The molarity of the solution is….. mol dm-3. (Round off to the nearest Integer). [ Atomic masses: K:39.0 ; O:16.0; H:1.0 ]

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answer is 9.

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Detailed Solution

m=1000×M1000×d-M×GMWsolute6.5=1000×M1000×1.89-M×566.51890-56M=1000M1890-56M=153.8M209.8M=1890M=9
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