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(II) Estimate the time needed for a glycine molecule (see Table 13–4) to diffuse a distance of 25 µm in water at 20°C if its concentration varies over that distance from 1.00 mol/m³ to 0.50 mol/m? Compare this "speed" to its rms (thermal) speed. The molecular mass of glycine is about 75 u. TABLE 13-4 Diffusion Constants, D (20°C, 1 atm) Diffusing Molecules Medium D (m²/s) Н Air 6.3 × 10-5 O2 Air 1.8 × 10-5 O2 Water 100 × 10-11 Glycine (an amino acid) Water 95 × 10-11 Blood hemoglobin Water 6.9 × 10-11 DNA (mass 6 × 10° u) Water 0.13 × 10-11

(II) Estimate the time needed for a glycine molecule (see Table 13–4) to diffuse a distance of 25 µm in water at 20°C if its concentration varies over that distance from 1.00 mol/m³ to 0.50 mol/m? Compare this "speed" to its rms (thermal) speed. The molecular mass of glycine is about 75 u. TABLE 13-4 Diffusion Constants, D (20°C, 1 atm) Diffusing Molecules Medium D (m²/s) Н Air 6.3 × 10-5 O2 Air 1.8 × 10-5 O2 Water 100 × 10-11 Glycine (an amino acid) Water 95 × 10-11 Blood hemoglobin Water 6.9 × 10-11 DNA (mass 6 × 10° u) Water 0.13 × 10-11

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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(II) Estimate the time needed for a glycine molecule (see Table 13–4) to diffuse a distance of 25 µm in water at 20°C if its concentration varies over that distance from 1.00 mol/m³ to 0.50 mol/m? Compare this "speed" to its rms (thermal) speed. The molecular mass of glycine is about 75 u.
Transcribed Image Text:(II) Estimate the time needed for a glycine molecule (see Table 13–4) to diffuse a distance of 25 µm in water at 20°C if its concentration varies over that distance from 1.00 mol/m³ to 0.50 mol/m? Compare this "speed" to its rms (thermal) speed. The molecular mass of glycine is about 75 u.
TABLE 13-4 Diffusion Constants, D (20°C, 1 atm) Diffusing Molecules Medium D (m²/s) Н Air 6.3 × 10-5 O2 Air 1.8 × 10-5 O2 Water 100 × 10-11 Glycine (an amino acid) Water 95 × 10-11 Blood hemoglobin Water 6.9 × 10-11 DNA (mass 6 × 10° u) Water 0.13 × 10-11
Transcribed Image Text:TABLE 13-4 Diffusion Constants, D (20°C, 1 atm) Diffusing Molecules Medium D (m²/s) Н Air 6.3 × 10-5 O2 Air 1.8 × 10-5 O2 Water 100 × 10-11 Glycine (an amino acid) Water 95 × 10-11 Blood hemoglobin Water 6.9 × 10-11 DNA (mass 6 × 10° u) Water 0.13 × 10-11
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