A bottle of vintage red wine has lost its label. The concentration of tritium(H13)in the wine is 0.34 times that found in freshly bottled wines. If the half-life of tritium is 12.3 years, estimate the time elapsed since the wine was bottle

#7 how does the structure of amino acids allow them to form a polypeptide? each amino acid has an amino group and a carboxyl group. each amino acid has a hydrogen atom and a carboxyl group. each amino acid has a carboxyl group and an r group. each amino acid has an r group and a hydrogen atom.