Can you show what is the formula and show all steps 1. The purpose of question 1

Question

Can you show what is the formula and show all steps

1. The purpose of question 1 is to enable students to become familiar with diffusion times for different molecules and substances, and also to become familiar with diffusion coefficients (students should be careful to use diffusion coefficients with the correct units!) 1a. Fill in the numbers in the table (10 pts): 2 points off for each wrong answer Time to move 10 microns (typical size of animal cell) Object radius (nm oxygen Sucrose insulin hemoblobin 3 HIV bead bacteria time (sec) 0.02 0.13 2 10-5 5*10-6 -8.2*10-7 0.3 7*10-7 2.1*10-8 23 ~8.9*10-956 -2.9*10-9170 0.2 0.5 0.2 100 250 750

Explanation / Answer

Diffusion time refers to the time required by any substances to diffuse over a specified distance, how long a molecule takes to reach its destinations/ target cells by diffusion.

formula to calculate diffusion time=

t= X2/2D

WHERE D is diffusion coefficient of the solute in free soultion

the units of this is in area/ time i.e. cm2/sec

X is the mean distance travelled by the solute in one direction after elapsed time t

t is the elapsed time since start of diffusion

D is the function of physical characteristics of solute as well as the medium where the diffusion takes place

1nm= 1e7 cm

standard decimal notations should be used e.g. 10-7 USE 1e-7( use e notation )

t= (1.4*e-7)2 /-8.2* 1e-7=

approx 2.4 sec it will take to diffuse

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