Question

How long does it take oxygen to diffuse a distance of 1 mm in water at room temperature? How long does it take oxygen to diffuse a distance of 1 mm in water at room temperature?
A. 170 s
B. 0.30 s
C. 0.03 s
D. 10 s

Answer 1

Answer:

option A

Explanation:

given,

travel distance = 1 mm

diffusion constant for the  molecule  of oxygen in water = 1 x 10⁻⁹ m²/s

we know that

 $t = \dfrac{x^2}{2D}$

t is the time taken for diffusion

x = 1 mm = 10⁻³ m

D is the diffusion

 $t = \dfrac{(10^{-3})^2}{2\times 10^{-9}}$

 $t = \dfrac{(10^{3})}{2}$

        t = 500 s

so, the option to the answer is 170 s

the correct answer is option A