June 2010 Chemistry Regents #56-58

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Questions

Base your answers to questions 56 to 58 on the information below.

Glycine, NH2CH2COOH, is an organic compound found in proteins. Acetamide, CH3CONH2, is an organic compound that is an excellent solvent. Both glycine and acetamide consist of the same four elements, but the compounds have different functional groups.

56 In the space in your answer booklet, calculate the gram-formula mass of glycine. Your response must include both a numerical setup and the calculated result. [2]

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SETUP (1 point)

(1)(14.0 g/mol) + (2)(12.0 g/mol) + (2)(16.0 g/mol) + (5)(1.0 g/mol)

or       (1)(14) + (5)(1) + (2)(12) + (2)(16)

ANSWER (1 point)

75.0 g/mol   (no penalty for sig figs)

57 Identify one functional group in a glycine molecule. [1]

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amine

COOH

58 In the space in your answer booklet, draw a structural formula for acetamide. [1]

Answer to Question 58

 

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