The surface coverage of CO molecules obtained is θ = 0.069

Rationale

Firstly we need to calculate the incident flux of CO using the Hertz-Knudsen formula : this gives

   F = 3.83 x 1016 molecules m-2 s-1

Since the sticking probability is constant, the number of molecules per m2 is simply given by

Coverage= F x S x t
= 3.83 x 1016 x 0.9 x 20
= 6.90 x 1017 molecules m-2

which, when ratioed to the surface density of substrate atoms, gives

   θ = 6.90x1017 / 1.0x1019  ⇒  θ = 0.069

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