Insects obtain oxygen by diffusion through tracheae, tiny
tubes connecting the outside air to the interior...
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Biology
Insects obtain oxygen by diffusion through tracheae, tinytubes connecting the outside air to the interior of the body. Atypical such tube is about 2.3 mm long and has cross-sectional areaof 2.2 × 10-9 m2. Assuming the concentration of oxygen inside is 48% what it is outside in the atmosphere,
a. find the concentration of oxygen in the air at 24.9 ° C.Assume 21% is oxygen and the pressure is 1 atm.
--> using ideal gas law, a.) = 8.587 mol/m^3
b. Calculate the diffusion rate J of oxygen molecules in unitsof kg/s. Take the diffusion constant to be 1 × 10-5m2/s.
*Diffusion constant is 1*10^-5
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4.2 Ratings (741 Votes)
A The ideal gas law is represented by the mathematical expression PVnRT 1 where P pressure V volume nmoles of gas Rgas constant and T is temperature Here we have given P1 atm V21 or 021 m3
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