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The equilibrium vapor pressure above a silicon surface at 1123 K corresponds to 6.9 109 Pa. At equilibrium the fluxes of atoms leaving and returning

The equilibrium vapor pressure above a silicon surface at 1123 K corresponds to 6.9 109 Pa. At equilibrium the fluxes of atoms leaving and returning to the surface are equal.

(a) What is the flux of atoms/m2 s? b) What is the number of Si atoms/m3 in the vapor? (c) What is the velocity of the Si atoms in m/s?

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