Athin sheet of iron 0.5 mm thick has a nitrogen concentration on one side of 0.5 kg/m^3 and a nitrogen concentration on the other side of 3.5kg/m^3 . the diffusion coefficient is 3.44x10^-15 m^2/s. what is the flux of nitrogen through the iron?

2.064× 10⁻¹¹ kg/m²s

Explanation:

The expression for the Fick's first law is shown below as:

Where, J is the diffusion flux.

D is the diffusion coefficient =

dC is the concentration change ( 3.5 - 0.5 kg/m³ = 3 kg/m³)

dx is the thickness = 0.5 mm = 0.0005 (As , 1 mm = 0.001 m )

Thus,

Magnitude of the flux = 2.064× 10⁻¹¹ kg/m²s

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3