1. The problem statement, all variables and given/known data Estimate the volumes of the various amino acids in units of nm^3 2. Relevant equations V = 4/3*pi*r^3 3. The attempt at a solution Is it alright to treat the amino acids as spheres? Using this I was thinking of measuring the distance, atomic radii and bond length, between end of R group and C terminus. Is this the right way to go or am I missing the problem completely?