If the density of surface sites is 2.40 ×10^14 cm^-2 and every molecule that strikes the surfac

step 1 Hello everyone. So the question is 20 % of surface sites are occupied by N2 molecule. The densit

If the density of surface sites is 2.40 ×10^14 cm^-2 and...

If the density of surface sites is $2.40 \times 10^{14} \mathrm{~cm}^{-2}$ and every molecule that strikes the surface adsorbs to one of these sites, determine the fraction of a monolayer created by the exposure of a $1.00-\mathrm{cm}^{2}$ surface to $1.00 \times 10^{-4}$ langmuir of $\mathrm{N}_{2}(\mathrm{~g})$ at $298.15 \mathrm{~K}$.

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Key Concepts

Monolayer Adsorption

This concept refers to the self-limiting process where adsorption occurs only until one complete layer (or monolayer) of adsorbate molecules covers the surface. It is a useful idealization for studying how gas molecules interact with and saturate a solid surface.

Surface Site Density

This key concept involves the number of available adsorption sites per unit area on a surface. It is a crucial parameter in surface science because it determines how many molecules can be accommodated in a monolayer on an adsorbent's surface.

Langmuir (Unit of Exposure)

The langmuir is a unit used to quantify the exposure of a surface to a gas, and is typically defined as the product of pressure (in torr) and time (in seconds). It provides a measure of the total number of gas molecules that arrive at the surface, facilitating comparisons of adsorption under different experimental conditions.

Adsorption Coverage

This concept is expressed as the fraction of the surface that is occupied by the adsorbed molecules. It is calculated by comparing the number of adsorbed molecules (derived from gas exposure and reaction conditions) to the total number of available surface sites, thereby providing a measure of how completely the surface has been covered by the adsorbate.

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