Take molar mass of glycine = 75 g/mol, water = 18 g/mol. What is the molar mass of the dipeptide glycylglycine?
Correct answer A. 132 g/mol
Explanation
Two glycine molecules condense with loss of one water molecule. Molar mass = 2 × 75 − 18 = 132 g/mol. Forgetting to subtract water gives 150 g/mol.
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