In a study of the catalytic properties of a titanium surface it was necessary to maintain the
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In a study of the catalytic properties of a titanium surface it was necessary to maintain the surface free from contamination. Calculate the collision frequency per square centimetre of surface made by O2 molecules at
(a) 100 kPa,
(b) 1.00 Pa and 300 K.
Estimate the number of collisions made with a single surface atom in each second. The conclusions underline the importance of working at very low pressures (much lower than 1 Pa, in fact) in order to study the properties of uncontaminated surfaces. Take the nearestneighbour distance as 291 pm.
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