What are the units of (d) m is the mass, t is time, d is the diameter, d is the diffusion coefficient, m is the molar mass, r is the universal gas constant, t is the temperature, and p is the partial (dm/dt) = (-2pi)*(d)*(d)*(m/(rt))*p

Answer : The unit of (D) in metric system is

Explanation :

The given expression is:

where,

m = mass

t = time

d = diameter

D = diffusion coefficient

M = molar mass

R = universal gas constant

T = temperature

P = partial pressure

In metric system,

The unit of mass is, kg

The unit of time is, s

The unit of diameter is, m

The unit of molar mass is, kg/mol

The unit of universal gas constant is,

The unit of temperature is,

The unit of partial pressure is,

The unit of diffusion coefficient will be:

or,

Now put all the unit in this expression, we get:

Therefore, the unit of (D) in metric system is