Question

The number of particles crossing per
unit area per second
п, -п
n= D (x2-x,
where n, and nu are number of particles
per unit volume and X and X2 are their
distances. The dimensions of diffusion
constant is D
(a) M^°LT^-2
(b) M^°LT^-4
(c) M^ºLT^-2
(d) M^°LT^-1​

Answer 1

Answer:

Since N is no. of particles per unit area per unit time, thus its dimensions are molL  

−2

T  

−1

.

n  

1

​  

 and n  

2

​  

 are no. of particles per unit volume. Thus they have the dimensions molL  

−3

.

x has dimension of length, i.e L.

Thus, D has dimensions of

Explanation: