2 . 5 g of protein containing only glycine C 2 H 5 NO 2 is dissolved in water to make 500 mL of solution. The osmotic pressure of this solution at 300 K is found to be 5 . 03 × 10 - 3 bar. The total n

Question

2 . 5 g of protein containing only glycine C 2 H 5 NO 2 is dissolved in water to make 500 mL of solution. The osmotic pressure of this solution at 300 K is found to be 5 . 03 × 10 - 3 bar. The total number of glycine units present in the protein is (Given : R = 0 . 083 L bar K - 1 mol - 1 )

TestHub · Accepted Answer

π = CRT 5 . 03 × 10 - 3 = 2 . 5 × 1000 M . wt × 500 × 0 . 083 × 300 M.wt. = 24 . 752 × 10 3 gram = 24752 gram Molar mass of glycine NH 2 CH 2 COOH = 75 g / Mol . No of glycine unit in protein = 24752 75 = 330 . 02 ≃ 330 units

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