molar mass is the quantity of a substance in a mixture per unit volume of the mixture.
molar mass is the quantity of a substance in a mixture per unit volume of the mixture.
is the quantity of a substance in a mixture per unit volume of the mixture?
molar mass
bullet::::- is the diffusion flux, of which the dimension is amount of substance per unit area per unit time, so it is expressed in such units as mol m s. measures the amount of substance that will flow through a unit area during a unit time interval.









































bullet::::- is the diffusion coefficient or diffusivity. its dimension is area per unit time, so typical units for expressing it would be m/s.









































bullet::::- (for ideal mixtures) is the concentration, of which the dimension is amount of substance per unit volume. it might be expressed in units of mol/m.
fick's laws of diffusion
some nanoparticles outperform hydrogen (per unit volume) and hydrocarbons (per unit mass and volume) in terms of energy storage. two important metrics are the energy per unit mass and energy per unit volume. vehicles are usually designed on a per unit volume basis (for drag considerations). on a per unit volume basis, boron outperforms both hydrogen and hydrocarbons. on a per unit mass basis, boron outperforms hydrocarbon fuels but is not as good as hydrogen. therefore, the dass engines will take advantage of the excellent properties of boron along with hydrocarbon, and hydrogen fuels.









































section::::dass engine.:heat exchanger.
space engine systems