Question

What is the mean distance (in nm) between molecules in a x mm solution?

Answer 1

Answer:

bionumbers logo

e.g. “ribosome coli”; “p53 human”; “transcription”

Distance between molecules as function of concentration

Range Table - link nm

Organism Generic

Reference Erickson HP. Size and shape of protein molecules at the nanometer level determined by sedimentation, gel filtration, and electron microscopy. Biol Proced Online. 2009 May 15 11: 32-51. doi: 10.1007/s12575-009-9008-x. p.35 table 2PubMed ID19495910

Method "It is frequently useful to know the average volume of solution occupied by each molecule, or more directly, the average distance separating molecules in solution. This is a simple calculation based only on the molar concentration. In a 1-M solution, there are 6×10^23 molecules/l, = 0.6 molecules/nm^3, or inverting, the volume per molecule is V=1.66 nm^3/molecule at 1 M. For a concentration C, the volume per molecule is V=1.66/C. [Researchers] will take the cube root of the volume per molecule as an indication of the average separation. d=V^(1/3)=1.18/C^(1/3), where C is in molar and d is in nanometer. Table 2 gives some typical values."