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A4.25 %w/v solution (4.25g per 100.0 mL) of starch in water was found to have an...

A4.25 %w/v solution (4.25g per 100.0 mL) of starch in water was found to have an osmotic pressure of 82.7 mmHg at 303.6 kelvin. Calculate the average molar mass of the starch used, taking 1.00 atm = 760.0 mmHg. The value of the gas constant, R , is 0.0821 L atm K-1 mol-1. Present your answer as a numerical value only, to 3 significant figures in the form x.xxEx.

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Answer #1

The average molar mass is found to be

9.81 x 103 g/mol

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