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Three silicon samples are studied in a ultra-high vacuum chamber at a temperature of
298 K and pressure of 10-12 mbar. They have bulk-exposed surfaces parallel to the
planes (100), (110), and (111), respectively.

(e) Estimate the oxygen coverage in monolayers (ML) for the three surfaces.
(approximate to 2 significant figures).
(D) Whisk
(5)

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