Synthetic and naturally occurring polymers (chemistry only)

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Question 6
Medium

During the mass spectrometry analysis of a hydrolyzed protein sample, a biochemist isolates a pure sample of an acidic amino acid. This amino acid can be represented by the general structural formula:

H2N−[R]−COOH \text{H}_2\text{N} - \text{[R]} - \text{COOH} H2​N−[R]−COOH

where [R]\text{[R]}[R] represents the variable central section of the molecule.

The relative formula mass (MrM_rMr​) of this amino acid is 147.

Calculate the relative formula mass of the section represented by [R]\text{[R]}[R].

Relative atomic masses (ArA_rAr​):

H=1C=12N=14O=16 \text{H} = 1 \quad \text{C} = 12 \quad \text{N} = 14 \quad \text{O} = 16 H=1C=12N=14O=16
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Synthetic and naturally occurring polymers (chemistry only) Questions

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